• XH-426 Stainless Exhaust Material
• NK-842 Stainless Intake Material
• Chrome Stems and Hard Tips
• Swirl Polished and Fully Machined
• Thin stem for increased Flow and Lightweight
  (5/16" .311" stem)

RPMS & Thin Stem Valves:
Use of the thin stem valves will enable an engine to achieve higher RPM levels. Strict vigilance must be maintained to keep the engine from RPM's that cause valve float. When valves float (bounce on the seat), the stresses rapidly increase and the fatigue life of the valves is dramatically reduced. These valves are heavier than titanium and cannot be expected to operate at comparable RPM ranges.

To help the engine avoid a valve float condition, purchase - and maintain - the best valve springs available. Use lightweight titanium retainers and titanium valve locks. Use quality pushrods and operate engine within sensible RPM limits.

Rockers & Thin Stem Valves:
Because of the reduced size of the valve stems of the valves, it is advised to use a shaft type rocker which keeps the rocker tip basically centered on the valve. If increased tip area is needed, utilize a wear cap, but be cognizant of the fact that the cap ads to the toss weight of the valve train thus reducing the safe RPM potential of the engine.