AFR Competition CNC Ported Aluminum Chev SB Head
100% competition high detail CNC ported intake runners, exhaust runners, and combustion chambers. Other features include angle plugs, hardened ductile iron interlocking valve seats and 3/4" thick decks (great for supercharger and nitrous applications). Fully assembled with 2.08/1.60 stainless steel valves, 1.550" roller springs, 10 degree locks/retainers, bronze guides, studs and guide plates.
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