Smart Racing
Valve Spring Kit: Springs, Retainers,
and Bases (Our valve spring kit can be used with
stock retainers - for production club racing.)
• 8000 RPM safely with STOCK rocker arms.
• Approximately 120 LBS of seat pressure with .500" lift cam.
• Many years of race proven experience and testing
• A must for ANY engine, street or race.
• Install some insurance from costly overrevs.
911 9 mm valve (Set of 12) . . . 134100 . . . $550.00
911 8 mm valve (Set of 12) . . . 134200 . . . $550.00