Chevy 350 High Performance

Chevy 350 High Performance Aluminum Cylinder Heads Intake Runner Volume – 200cc Combustion Chamber “As Cast”, Chamber Volume 66CC Valve Seats profiled to accept 2.02″/1.60″ valves Spark Plug Configuration – Straight Machined to accept common screw in studs and guide plates; 7/16′ NC base threads Universal valve cover bolt pattern accepts both standard perimeter and center bolt configurations Intake Manifold accepts both standard 12 bolt and later 8 bolt vortec intake Exhaust accepts strandard SBC exhaust headers and manifolds; seven bolt flange Fitted with alloyed hard seats for extended valve seat life 11/32″ bronze guides with .562″ OD @ spring base Seal provision uses 11/32″ x .530″ valve seals Spring base diameter – 1.600″ accepts both small and large OD springs Flow Data @28″                                                             Flow Data @28″  4.030″ Bore                                                                                 4.165″ Bore Flowed using Qualcast Intake