CID LS7 3.3" MCSA 12D PA (Power Adder) BE Cylinder Heads suit 4.125" Bore - 60CC Chambers

LS7 Inline 420 CFM Cylinder Heads

One pair of Bare 12 Degree Inline LS7 12D 3.3" MCSA Port BE cylinder heads CNC ported and valve jobbed with CHE valve guides and CHE Ductile Iron valve seats. Standard height exhaust port fits all existing headers. 

Developed by Greg Good the LS7 3.3" Intake port is the smallest LS port we offer on the shaft mount castings. They flow 400+CFM, with almost 300CFM at just .400" lift with a 2.200" valve. The heads share the same optimized valve locations as our record setting LS 12D Oval Port  BA Cylinder Heads with 2.200" Intake valves and 1.625" Exhaust Valve flowing over 280 CFM.

Standard valve stem size is 5/16" with valve lengths of 5.8" . A 1.600" diameter valve spring pad can accommodate a 2.1" installed height 

They feature a Power Adder friendly Softened 60cc chamber. Available with CHE Ductile Iron Valve Seats or upgrade to CHE Bronze Valve Seats. 

Heads require aftermarket shaft mount rockers available from either Crower (Cast Stainless P/N 74435F - Billet Steel P/N 74435B) or Jesel (Multiple options available) and will likely require aftermarket pistons, or modification to existing pistons. Aftermarket Pistons are available from Diamond, Ross and others. 

They are a perfect match for our 4.5 and 5.0 BA LS intakes allowing complete customization for your intended HP requirements."