This head was designed to allow owners of Gen III ls engines to benefit from the much-improved stock LS3 intakes.  

This head really thrives when paired with a stroker combination like a LS1 383!

•Easy bolt on to convert your GM Gen III to GM Gen IV head technology

•Perfect for LS1, LS2 and LS6 engines and short-blocks

•Accepts LS3/L92 valve springs, rocker arms, and intake manifolds

•Outflows any aftermarket cathedral cylinder head on the market

•Uses a 2.080" intake valve and 1.60" exhaust valve

•11 Degree Valve angle

•Has a 250cc intake port

•Has a 61cc combustion chamber standard

•6 Bolt Standard

•Has a deck thickness of .750"

Bore size 3.90"

SPRING: PAC Racing 1204x 0.700" lift  for naturally intake 

              PAC Racing 1207x0.750" lift for force intake/factory rockers

Intake Valves: 2.08x 5.45"

Exhaust Valves:1.60x5.45"