"MAKING POWER BY REDUCING THE MASS OF YOUR VALVE TRAIN"
Since his start in drag racing as a teenager 1950s, Flathead Jack quickly became a pioneer in the Northern California drag racing circuit. From racing traditional dragsters to Hemis to small-block Chevys, Flathead Jack is well known for his engineering ability. He is famous for his ’49 Merc custom cruiser as well as his famous injected twin-engined flathead dragster. While known as a trailblazer in drag racing, Flathead Jack is also known for his high-quality flathead components. With over 50 years of experience building and racing dragsters, Flathead Jack is one of the premier dealers of valve components in California.
Hollow Adjustable Flathead Valve Lifters (P/N JX-36)
Manganese Bronze Flathead Valve Guides (P/N JX-428)
Flathead Polished Performance Valve Spring Set (P/N JX-120-P)
Flathead Ultra Lightweight Racing Valves. (4 variations)
THE PRODUCTS YOU ARE LOOKING AT ON THIS SITE ARE ADVANCED DESIGNS OF THE JAX VINTAGE VALVE COMPONENTS ALL NEW AND ALL AMERICAN MADE ULTRA-LITE PRODUCTS POISED TO TAKE THE FLATHEAD ENGNE’S VALVE TRAIN TO THE HIGHER R.P.M. RANGE AND, “DONE SO”. WITHOUT WASTING HALF THE CAMSHAFTS UPPER END POWER JUST TO GET THAT OVER STROKED, HEAVY COUNTER WEIGHTED CRANK DOWN TO THE BOTTOM OF THE PAN, TURNED AROUND AND THEN ALL THE WAY BACK UP TO THE TOP PRODUCING VERY LITTLE OF THE FLATHEAD’S R.P.M./ HORSEPOWER… AND THEN, ONCE AGAIN DEPENDING ON THE VALVE TRAIN TO RID THE SPENT HYDROCARBONS’ BY WASTING THE OTHER HALF. THE FLATHEADS POWER IS THE PRODUCT OF THE CAMSHAFT AND THE MORE FREEDOM IT HAS TO MAKE THAT POWER THE MORE YOU WILL HAVE. THE REST OF THE FLATHEADS DESIGN IS TO ROB THAT POWER JUST TO MAKE THAT FLYWHEEL TURN AROUND FOR THE CLUTCH, OR A BUZZ SAW, WIND MACHINE OR IRRIGATION PUMP. THE FLATHEADS POWER CURVE COMES IN AROUND FOURTY TWO HUNDRED R.P.M’S AND ITS GONE BY FOURTY EIGHT. IF YOU MISS THAT BRIEF MOMENT YOUR LOOKING IN THE WRONG SPOT. “THE SECRET IS IN THE VALVE TRAIN”.