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 vortex intake
Exhaust accepts standard 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
4.030″ Bore 4.165″ Bore