275cc CNC intake runners. 127 CNC combustion chambers.
Manley Intake Valve Race Series 4.900X2.165 In Gm Ls-Series 8 Pc P/N 11620-8
Manley Exhaust Valve Race Series 4.923X1.590 In Gm Ls-Series 8 Pc P/N 11621-8
Manley Intake Valve Race Series 4.874X2.000 In Gm Ls-Series 8 Pc P/N 11360-8
Manley Exhaust Valve Race Series 4.923X1.575 In Gm Ls-Series 8 Pc P/N 11363-8
Manley Intake Valve Race Series 4.874X2.020 In Gm Ls-Series 8 Pc P/N 11362-8
Manley Exhaust Valve Race Series 4.923X1.600 In Gm Ls-Series 8 Pc P/N 11365-8