Ferrea Competition Plus Hollow Stem 2.020" Intake Valves (Set of 8) - SB Chevy - 11/32" Stem Diameter - 5.010" Length 4101CSMBK As this visor stops 5mm

As this visor stops 5mm short of the lower sealing rubber when fully closed

clip-in design

and crush so badly they often fall off

10-24 in Adjustable

Fits both Small and Big Block Chevy

Ferrea Competition Plus Hollow Stem 2.020" Intake Valves (Set of 8) - SB Chevy - 11/32" Stem Diameter - 5.010" Length 4101CSMBK As this visor stops 5mmAn important factor to take into consideration to increase the engine's RPMs, is the valve train weight. Of course, the valve being a main component, the design has to be perfected to accomplish the weight reduction to allow higher RPMs. Ferrea's latest contribution to this area is the introduction of its Lightweight Hollow Stem Valve. We developed a manufacturing process that gun drills and micro polishes the stem to achieve a valve reduction in