Now you can add GM Performance Parts LS6 "CNC Ported" heads for 405HP+! This packages is the same as our regular LS6 conversion packages, but it packs even more power from the better flowing GM Performance Parts CNC heads! Package includes: GM Performance Parts LS6 "CNC Ported" & Assembled Heads (Hollow Stem Intake & Sodium Filled Lightweight GM LS6 Valves) - GM Head Bolts - GM Head Gaskets GM LS6 Cam - GM Water Pump Gaskets - GM Timing Chain Front Cover Gasket - GM Timing Chain Cover Crank Seal - GM Crank Bolt - GM Valve Cover Gaskets
Technical Notes: *This is an off-road conversion only and may not pass emissions compliancy testing. *97-00 vehicles will require the removal of the EGR valve. *PCM must be reprogrammed on all models to ensure accurate fuel system calibration for the LS6 specifications. *The 405 H.P. is derived based on the factory specifications of the 02 LS6 Corvette. Actual results will vary based on individual vehicle set-up.