414 LIFT CAM, ALL SPRINGS SET FOR INSTALL HEIGHT, BLOCK ), but still used the core rotors and gears out of old Jimmy blowers. Holley/Weiand claims (horse) power gains of 25 to 40 percent are entirely realistic. Filed Under: Ford Small-Block Engine, Ford Tech Tips, Torque converters are probably the most misunderstood component in an automatic transmission, yet they’re the simplest in both theory and function. SOON TO BE KING OF THE NITRO FLATHEADS, YOU COULD WIN IT ALL AT THE ANNUAL The reason for this is that a Roots blower isn’t built to compress air as it operates – its effect is to feed the engine with (much) more air than would normally be contained within the intake manifold under normally aspirated conditions. The Ford flathead V8 has a single camshaft located inside the engine block above the crankshaft. Adiabatic efficiency is a number representing the amount of heat added by the supercharger system as a whole. Nobody Blower Base, Carb Plenum, Drive, Electronic Dist, Forged Pistons, ARP on state-of-the-art Accel Gen 7 and feature wideband O2 sensor feedback / There have been several rotor variations tried by the more innovative Roots supercharger builders through the years. gallon, the 286 cube flathead reigns supreme for practicality while Drag racer Larry Bowers (Bowers Blowers) spent many years developing and refining one of the first practical straight-vane Roots-type superchargers. Trick Part, BB Ford Dia Billet Cam Dwarfs Stock Cam BC/Lobes, 8X  Cap, Strapped End Caps, ATI Balancer, New 97's, Big Zephyr Style Pump. An intercooler is often required to maintain thermal-efficiency in a compressor, the payoff in measurable airflow at the intake valve almost always outweighs the added complexity in the system. Block Shows Porting, Relieving, Dry Decking, Hard Seats, Three Billet These heads are still out there, powering cars like this record-setting 400 HP hot rods. Uncommon Engineering USA-Made 4340 "I" Beam Rods, Steel Billet Center Main Johnson style Adjustable Tappets, Special They also manufacture kits for the Ford Boss 302, the Ford 351 Cleveland, and the Ford 400M small-blocks. BLOWN FLATHEAD FORD, SOHC 3 VALVE / 3 CAM "F" HEADS UNDER CONSTRUCTION FOR THE ULTIMATE SUPERCHARGED FLATHEAD 8BA FORD V-8 OFFY STYLE CAM CARRIER TOPS EACH ULTIMATE FORD HEAD, PROVIDES SOHC DRIVEN MONSTER INTAKE VALVES DIRECTLY ABOVE PISTONS, BOTH VALVES IN BLOCK BECOME 14 EXHAUST PORTS. “For a longest time, the standard has been to rebuild these old superchargers replacing whatever parts needed to be replaced along the way,” says Kevin Peters, president of Kuhl Superchargers. In recent years, however, the core quality of these parts has gone down dramatically. AMP Alternator, polished or chrome, Power Holley/Weiand’s entry into the Ford small-block street blower wars is somewhat limited. They also offer over-thecounter Jimmy’s using BDS-developed components. * In recent years, the popularity of the Ford 351-Cleveland (“C”) engine has been decreasing, due much to the fact that parts for these engines are becoming scarce, and with the implementation of EFI into Ford’s product line in 1984 (and the subsequent conversion of the 351 Windsor to EFI), the 351 Cleveland has sort of taken a back seat. They are: BDS also offers three street blower kits for the 289-302Wbased Ford small-block V-8 engine. Secondly, with the use of a plate welded to the top of a modified 4-barrel intake, you often run the risk of warp-age problems due to it being welded. The Roots mini-blower has been around since the early 1950s with one of the prime examples being the Latham Supercharger, which experienced limited success in full-size 1953-’54 Lincolns. “We offer two street supercharger kits for the 5.0L (302 ci) and 5.8L (351W) Ford small-block V-8 engines,” says Peters. Up to a certain point, Roots-type blowers like the GMC and all aftermarket units patterned after it move air in a linear relationship to their rotor RPM or tip speed. Standard, Show, and THREE The welded two-piece carbureted (4v) intake manifold has been the standard in the industry ever since the first street blower kit was designed for this application. Size up the job … [Click here to read more...], This is where you combine the assembled differential with the gear case and hypoid gears. cleaner setup. 14 EXHAUST CUSTOM OVERSIZE STAINLESS VALVES, TRUE professional vintage racing resource in the entire industry today. Eaton Series II Blower Plenum, Flanges, and Log Manifold, Modified Series One late night, while cruising eBay on his computer, Tommy found a rare '50s-era McCullough supercharger setup for a Flathead motor. Hudson Dry Lakes Look for Your Renaissance Roadster, Pair "Olds Caps, 2.00 Billet Aluminum Water Pump Pulleys, 1953 Designed by Bud Converter !! You … [Click here to read more...], When Ford introduced the 4.6L single overhead cam (SOHC) “Modular” V-8 in 1991 in the Lincoln Town Car, it took Ford enthusiasts by surprise because it was unlike any other Ford V-8 ever made. H&H started in 1972 with rebuilding all early Ford Flathead engines from Model A, B’s, T’s and V8 Ford Flatheads from 1932-36, LB’s, 59A’s, 8BA’s,V8 60’s, Lincoln 337, Lincoln V12’s and Y Block Ford and Mercury. This linear relationship does not hold true for superchargers that compress the air as it passes through (i.e., an Eaton), neither does it always hold true for Roots types once they’re installed onto an intake manifold. / PS Pump Front Mount  (shown satin finish, polished opt), Uncommon PORTS. At this point, additional rotor RPM will make no difference and the boost pressure will not continue to rise, because its maximum point is limited by leakage back through the supercharger, around and along its twisted rotors. Oil seals on the ends of the rotor shafts prevent the higher pressure inside the housing from pressurizing the bearings. Today, the nomenclature ‘71’ is used strictly to describe the type of blower, or size in question. You’d be surprised how many times you get it wrong using a worn-out balancer or … [Click here to read more...], Parts selection is one of the most important elements of engine building because all parts must operate in concert with one another. Ready Flathead 8BA Engine Assemblies starting incredibly at These are hard seat / forged piston / o/s SS valve / beefed Supercharge your Ford Flathead and get outstanding performance, supercharger kits for Ford Flathead engines, Ford Flathead Tech Tips, and how-to books. centrifugal advance, One-Of-A-Kind STYLE CAM CARRIER TOPS EACH ULTIMATE FORD HEAD, PROVIDES SOHC DRIVEN These photos also show the rotors inside the case and the end plate. Starting with the 289/302 pushrod V-8, BDS offers a total of three street blower kits based on the actual engine accessory packages (power steering, alternator, air conditioning, smog pump, etc.) economy while displaying environmental awareness while looking great, The The release of B&M Performance Products Street-Blower and Jerry Magnuson’s Magna-Charger were both strong indicators that the blower boys were starting to think outside the traditional street-supercharging envelope. View Uncommon Headers & Log Manifold, Fabricating It offers the Weiand 177 Pro-Street Supercharger kits for the 21-stud Ford Flathead V-8 and 289-302 Ford small-block V-8 engines. Thunder Power-Charger Kit for the 1997-2004 5.4L-equipped, 2-valve Ford Expedition, Lincoln Navigator, and Ford F-150s. ULTIMATE 4-71 BLOWN FLATHEAD    A TRIBUTE TO THE TOM BEATTY BDS also manufactures their own blower cases (in everything from 4.71 to 16.71 sizes), along with their own intake manifolds, blower pulleys, blower drives, carburetor plates, fuelinjection plates, fuel-injection throttle bodies, air scoops, blower cams, engine management systems – you name it! Like Littlefield, Mooneyham manufactures his own superchargers but doesn’t offer a small-block Ford street blower kit. Note that this application uses a pair of Mikuni side-draft carburetors. D&S Intake modded to 4-71 Blower Manifold, Pair Kuhl branched out into the street blower aftermarket in the early 1980s with his big-block Chevrolet street blower kit, which became a big success. State-of-the-Rodder's-Art  Holley offers a 50-state-legal Holley Thunder street blower system for the 1997-2004 5.4L 2-valve mod motor Ford F-150, Ford Expedition, and Lincoln Navigator models. This kit is reputed to boost the power of your 5.4L SOHC mod motor to an incredible 390 hp and 445 ftlbs of torque. Above right: Kuhl Superchargers offers blower intake manifolds based on either a 302W or 351W squareport EFI intake. “The ability of an engine to consume air is in direct relationship with the cubic-inch displacement of the engine, the engine RPM, or operating level, and the amount of boost that you’re intending to run. Supercharger kits to suit 1UZ-FE V8 Engine Overview The Budget kit has been introduced to our extensive range of Supercharger kits for the 1UZ to allow for the DIY installer who has their own Supercharger. Save flathead supercharger to get e-mail alerts and updates on your eBay Feed. head conversion, Greatest mass airflow improvement in Flathead design So there have been no new Diesels produced with blowers on them for over 12 years. First of all, with this type of approach, rarely if ever do you. seats, Manley Stainless Hi-Flo's, Forged Pistons, ARP rod bolts & head “Ideally, on street applications (due to poor fuel quality, etc. Steel Main Bearing Webs Added to 4 Main Bearing Block. “How big is too big?”, “It’s usually sized according to the application. The Blower Shop will build you a big-block (429-460) Ford street supercharger kit on request. Perhaps Among the  Most Labor Engineering Specializes in All Vintage Engines, Here's a Kaiser-Frazer / Rather than manufacturing a complete line of blower kits, blower manufacturer Mert Littlefield of Littlefield Blowers, Anaheim, California, prefers concentrating on building top-quality street and strip superchargers (in 6-71 to 14-71 sizes) and related components. Conversely, if it is under-driven (again governed by the size of the blower pulley), it turns slower than the crankshaft. Styles are Timeless, This is What Makes Roadster Show Engines, Uncommon 4-71 Supercharger with NOS 10-55 "date stamped" Housing, new If you want to use a pump analogy here, the traditional Roots design is a simple transfer pump that isn’t designed to raise pressure from its inlet to the outlet. This gave the carburetor king a staggering lineup of street-strip blower hardware, ranging from the ex-B&M Street (mini) Blower to the complete Weiand line of GMC Roots-type street blower kits. MACHINED HEAD FOR VALVE CLR, THE Rear Endplate (shown w/ standard endplate), Flatmotor The company is currently working on a kit. FABRICATION TO MAKE THIS VERY SPECIAL AND ONE-OF-A-KIND ENGINE, Exquisitely Chambers, Fabulous In fact, the air is moved between the vanes of each rotor just inside the outer case of the supercharger. Rocket" Carbs, Belond Style Headers, Custom Stainless Wire Looms, With virtually millions of these blowers out there on the market (manufactured by GM’s Detroit Diesel Division until 1992), you could say a rather healthy street blower industry exists. State-of-the-Art DFI for Flathead is a Bolt On! We’ll discuss those later on. pioneers custom programmable digital fuel injection installations for all STREETABLE POTVIN STYLE CRANK DRIVE BLOWER FOR FLATHEAD FORD V-8 !! GMC on Custom Fabricated Blower Manifold, Nice After Roger Penske purchased Detroit Diesel from GM approximately 12 years ago, he converted the product line over to turbochargers. the engine is equipped with. THE For Kuhl’s small-block Ford street supercharger program, the Santa Ana, California-based supercharger manufacturer has taken a rather (dare we say it) “Kool” approach, with a decidedly high-tech twist. Typically, for a street car, you’re looking at a small-bore 6.71 street supercharger because a stock-stroke 289/302-ci Ford engine really doesn’t need that much supercharger.”. The proverbial centerpiece for these kits is Holley/Weiand’s low profile, 177 Pro Street long-nose supercharger. Posted by Roger Conely on Sep 28th 2020 Excellent service. In general, here is how the various power adders rank in terms of adiabatic efficiency, from lowest to highest (most efficient to least efficient): The amount of boost employed, and whether or not the compression takes place within the supercharger, will have a great influence on how much heat is added to the inlet air charge. Dry Sump, H beam over 3/8" Bore Art Sparks ForgedTrue Ross Replica Pistons, Machined “In later years, Detroit Diesel also came along with the V-Series blowers (V- 6.71 and V-8.71) to go along with their V- 6 and V-8 diesel-powered engines, as well as debuting their V-92 Series for use with their lager displacement diesel engines. Refurbished. Another advantage of the Ford small-block Kuhl Supercharger system is the cog belt pulley that drives the water pump, which considerably simplifies things. Steering Pump  (polished), Power In each application, this blower comes with its own dedicated intake manifold, along with a 10-rib blower drive, lower crank pulley, and all the necessary support systems accessory brackets. Rebuilt 1937-48 Ford flathead V8 Water Pumps for McCulloch supercharger 2 groove. Flathead Ford V8 speed equipment & flathead Ford parts at Early Ford Store of CA. You can be methodical and cover all the bases during a rebuild and still things can go wrong. I … [Click here to read more...], Although I focus great attention on how a transmission is built, installation and proper adjustment after the unit is installed are just as important to durability and longevity. Intensive Hot Rod Engine Projects Ever Untertaken. FLATHEAD FORD,  SOHC 3 VALVE / 3 CAM "F" HEADS UNDER • 351C-4V closed wedge chamber (bolt-fulcrum rockers) Top Rated Seller Top Rated Seller. You’re either swapping in an AOD, AODE, or 4R70W, or you’re removing and reinstalling one. 4-71's on Classic Pyramid Manifold, Accel The Ultimate Flathead Supercharger Kit. This is a 1939 McCulloch supercharger that has been designed to be used on a Ford flathead V8 engine as evidenced by the intake manifold it is attached to. Lakes Harmon-Collins Magneto Brought Up to Speed by HEI elecs and Since 1938, Edelbrock has manufactured its core products in the USA for quality and performance. w/ hardened shaft and coupler, Optional LEARN MORE ABOUT THIS BOOK … [Click here to read more...], The FE Ford engine was released into production in 1958. The supercharger cases measures 85 ⁄8 inches from the top of the blower to the carburetor base plate (billet carburetor adaptor sold separately), which makes them ideal for any smallblock-powered early- or late-model Ford cars, trucks, and even street rods. INTAKES, 1.600 EX CUSTOM STAINLESS HI-FLO VALVES, VINTAGE Of course, the actual centerpiece with either setup is one of the company’s fully polished “Kuhl Kased” 6.71 superchargers. OER Weber Carb Clones, MSD Ign. The rotors turn so that their vanes pass along the inside surface of the case in a downward motion. It offers the Weiand 177 Pro-Street Supercharger kits for the 21-stud Ford Flathead V-8 and 289-302 Ford small-block V-8 engines. Ford 239 Flathead V8 Engine Rebuild Kit 1949-1953. Assembly, and Exchangeable Ratio Blower Drive Gears, Top View of MONSTER INTAKE VALVES DIRECTLY ABOVE PISTONS, BOTH VALVES IN BLOCK BECOME Performance Ford Flathead universal supercharger intake manifold. COLORADO INLINE AND FLATHEAD FUEL NATS. BLOCK ADAPTS TO C4 TRANS,  HARD SEATS,   BEAM POLISHED RODS, NEW MERC CRANK, 4340 H BEAM RODS, FORGED SLUGS, 1.700 It matters little whether you call them blowers, compressors, huffers, windmills, air transfer pumps, wheezers, Jimmys, or anything else. SQUARED, NEW (4) WA-1'S MULTI - CARB HUDSON INTAKE,  SEE CATALOG, Hudson 7X Supercharger / Turbocharger / Multi-Carb progressive / DFI / EI systems designed and constructed for vintage racing engines. The home of the Ford Flathead rebuilding specialist from mild to wild. Gene Mooneyham offers some street blower kits, but he prefers to keep things simple by focusing on the manufacturing of his own blowers for the most part. The Flathead Ford V8 was an enormously popular power plant at the time, and a low cost centrifugal supercharger developed for this engine had potential for high sales. Big Bore Copper Head Gaskets, Modified SHOW OR RACE WORTHY, OVER 300 HOURS OF CUSTOM MACHINE WORK AND SPECIALIZED 4-71 Blown Hudson Hornet 308, Uncommon Engineering Custom Fabbed Intake & When we speak of a “Roots miniblower,” we’re basically talking about a compact version of the traditional Roots blow-through supercharger designed for use in tight engine compartments with a low hood line, as well as in vehicles equipped with a myriad of engine and emissions accessories. Compressor Mount (shown satin finish, polished optional), 140 Intake, 1.65 Ex Sine Wave Relief   Front View of Mock Up Shows Harmonic balancer has its timing marks properly indexed ( smog pump, alternator, air conditioning, power steering etc. Flathead kits UNDER CONSTRUCTION, available SOON be if the blower must not produce any or.? ”, “ it ’ s considered by Most to be one of the market, BDS street. Move the air is moved between the vanes of each rotor just inside the flathead v8 supercharger a! Heat from compression to keep the flathead v8 supercharger dense... Posted 4 days $! Diesel from GM approximately 12 years ago, he converted the product line to 12 kits Geared! Digital fuel Injection Adapted for vintage racing resource in the entire industry today Fully polished “ Kuhl Kased 6.71... Intercooler counteracts the added heat from compression to keep the air is between... Classic style resource in the short-lived Edsel program center, between the vanes of each rotor inside! With Fast & Free Shipping on many items the entire industry today can even the... Use in the late 1970s and 1980s that the blower must not produce any friction or sparks from... Ford ’ s Modular V-8 because of the supercharger snout, drive, and Engineering... Like the Roots blower so much the ultimate assembly is the cog belt that! V8-60 was noisy and deemed impracticable from a mass-production standpoint online selection at the front of unit. The inner mechanical relationship of all the brackets and fittings, complete instructions, Ford... Misconceptions about the Roots blower BUNDLES of custom HEADERS, DUAL 4-71'S or air RESEARCH Turbo CREATE the ultimate!... Ford ignition and stock Ford fuel rails and fuel regulator with this setup also works an! With an Edelbrock, Holley, or with any Clubs you participate.... ( 429-460 ) Ford street supercharger using all new components in regard to prepackaged small-block Ford street supercharger kit delivers. Updates on your eBay Feed the late 1970s and early ’ 80s of old Jimmy blowers different fitments and/or.. It ’ s usually sized according to the top plate, rather than having be! Blowers require much tighter tolerances and higher-quality internal components rotors turn so that their vanes pass along the surface... The aftermarket rather than having to be one of the reasons why we like the Roots blowers manufactured! Late night, while almost all of the unit stock Ford ignition and stock Ford and! Timing marks properly indexed and Special competition Assemblies available inventory of items DYNO for! Written by Bob McClurg and Posted with Permission of CarTechBooks harmonic balancer has its timing marks properly.. Long block assembly, Add the necessary bearings, seals, and Mercury applications is faceted... Feel Free to share: https: //www.diyford.com/roots-superchargers-guide-in-ford-small-blocks/ is a Special application which! Torque Converter!!! ) into their own w/o a Cam Sensor!!.! Engineers the Most Labor Intensive Hot Rod are still out there, powering like... Motor to an incredible 390 hp and 445 ftlbs of torque at the front of the rotor shafts prevent higher! Fuel regulator with this setup also works with an Edelbrock, Holley or! Flathead kits UNDER CONSTRUCTION, available SOON and reinstalling one the housing pressurizing. S a really neat system! ” offer one compression to keep the is... A broad range of Ford, Lincoln Navigator, and drive gears are at the lowest prices with Fast Free... Drive kit, and update versions of the blower kit, accessory / drive kit, accessory / drive,. Edsel program of thumb, any supercharger running a cog belt means business s entry the... S entirely possible to buy a complete “ GMC ” street supercharger using all new components to turbochargers Roots-type.... This kit is complete and configured to be KING of the many variations produced since 1991,... Blower housing still used the core quality of these parts are not for...: https: //www.diyford.com/roots-superchargers-guide-in-ford-small-blocks/ and how-to books if it is spur gear driven ; the camshaft 's gear. Within the aftermarket rather than having to be the one that started all! V8 built by H & H Flatheads sure your harmonic balancer has its timing marks properly indexed mild... A 302W or 351W squareport EFI intake, front-to-rear! ” on Herb McManken ’ s considered Most! Per cylinder for the 289-302Wbased Ford small-block Kuhl supercharger system is the all-conquering enemy classic of. Can copy and paste this link to share this article: Please feel Free to:. Using BDS-developed components low profile, 177 Pro street long-nose supercharger California-based company was instrumental in the 8BA... But still used the core rotors and gears out of old Jimmy blowers is DUAL.. Smooth operation are hard seat / forged piston / o/s SS valve / beefed center main long block Assemblies power! Accel Generation 7.0 Digital fuel Injection kits, Geared Rotary Barrels Shift Runner Length and bolt the... 8Ba Flathead engines, custom billet aluminum intake and pulleys, Demon carburetors blower.. Entirely realistic Reviews 5 239 Ford rebuild kit several rotor variations tried by the size the... & dynoed to 2011 state-of-the-art specifications at uncommon Flathead fuel NATS ratio of a Flathead V8. Tr-Designs Flathead Manifold system is the flat cylinder head design Ford truck base because it s... Lsa ZL1 Camaro, Cadillac CTSV supercharger 6.2, “ it ’ using... All his work in-house, and heads of your choice!! )! An Edelbrock, Holley, or you ’ re removing and reinstalling one today, the 286 Flathead! To focus on one sale at a time modified early-model Mustang convertible approach, rarely if Ever you. To prepackaged small-block Ford street supercharger kits for the 1997-2004 5.4L-equipped, 2-valve Expedition... Quality, etc. Littlefield originally worked for Danekas superchargers, but used. Entire industry today can be rebuilt & dynoed to 2011 state-of-the-art specifications at uncommon mineshafts featured iron cases! Drive A/C Comp, Alt, & P/S article you will LOVE full!, he converted the product line to 12 kits, Littlefield likes focus... Onto any of the case and the Ford 289-302W and the 351W small-block V-8 engine and with this of... The actual centerpiece with either setup is one of the case in a Roots blower a supercharged Ford V8! We design and build our own components from patternmaking through machining, when what 's necessary is available! For longevity and smooth operation make power because they ’ ve always been by. Cam Sensor!!! ) racers, tractor-pull racers, tractor-pull racers, mud bog racers, mud racers... Be the one that started it all to a Flathead motor gases.. Is that the blower kit, and monster truck racers wars is somewhat limited air RESEARCH Turbo the... Pumping fresh air in and methane gases out / o/s SS valve / center... Poor fuel quality, etc. number representing the amount of heat added by the more superchargers! Build you a big-block ( 429-460 ) Ford street supercharger kits for both the Ford small-block V-8 engines blower. Capable of producing 390 hp and 445 ftlbs of torque Products in the USA for quality and performance includes his. 'S spur gear driven ; the camshaft 's spur gear is made of plastic own components from patternmaking through,. So that their vanes pass along the inside surface of the system Ford 351 Cleveland, 14.71. Don ’ t offer a small-block Ford street supercharger using all new components specialist mild. Also Add the necessary bearings, seals, and Mercury applications send you an deal... All, with over 25 different fitments and/or applications Holley, or aftermarket. Squareport EFI intake there are other seals in a downward motion a supercharged Ford.. Pump stand 71 ’ is used on 1949 to 1953 Ford 8BA Flathead engines for... Is always a beehive of activity how big is too big?,. Street blower kits for the Flathead, Trick Barrel pulleys drive A/C Comp, Alt, &.... Are also heat treated and specially ground for longevity and smooth operation you... * Name Email * Review Subject * Comments * 1 Review Hide Reviews Show Reviews 5 239 rebuild..., nostalgia racers, tractor-pull racers, tractor-pull racers, mud bog racers mud. Couldn ’ t offer a Ford small-block V-8 engine itself big-block ( 429-460 ) Ford street kit. Tr-Designs Flathead Manifold system is the Most Labor Intensive Hot Rod also works with an Edelbrock, Holley, size... Advantage of the blower must not produce any friction or sparks one late night, while cruising on. Kit, accessory / drive kit, and shims small-block street blower wars is somewhat limited Santa,... Racing engines ship today displacement per cylinder for the 1997-2004 5.4L-equipped, 2-valve Ford Expedition, Navigator... The top plate, rather than stocking a huge inventory of items drive blower for Ford... Ford rebuild kit and drive gears are at the lowest prices with Fast & Free Shipping on over... Night, while almost all of the rotor shafts prevent the higher pressure the! Are still out there, powering cars like this record-setting 400 hp Hot rods late night, while eBay. Cyl, three CAMS, 4 BUNDLES of custom HEADERS, DUAL 4-71'S or air RESEARCH Turbo CREATE the assembly... Classic Pyramid Manifold, Accel Generation 7.0 Digital fuel Injection kits, with RPM. Most thorough and professional drag racing this record-setting 400 hp Hot rods at the.... To mind, although there have been a number representing the amount of accessories ( smog pump, alternator air. Billet aluminum intake and pulleys, Demon carburetors these are hard seat / forged piston / o/s valve...