Ferrea F1066P Competition Plus -Hollow Stem Exhaust Valves 1.900 - Chevrolet, Chrysler, Ford (Big Block 3/8)

One important factor to take into consideration to increase the engine's rpm, is the valve train weight. Of course being the valve a main component, the design has to be perfect to accomplish the weight reduction to allow higher rpm's. Ferrea's latest contribution in this area is their lightweight hollow stem valves. Ferrea developed a proprietary manufacturing process that gun drills and micro polishes the bore of a valve stem. This proprietary process insures greater structural integrity than a hollow valve on the market. This achieves a valve reduction in weight of approximately 20 percent compared to a conventional stainless steel solid stem valve. The valves also feature friction welded tips, radial grooves, avionics chrome plated stems, seat hardness up to 42HRc and Super Flo design to improve.