Trick Flow Super 23 SBC 175cc Cylinder Heads, 56cc Chambers, 1.470" Valve Springs, Center Bolt Small Block Chevy Trickflow TFS-30310006 - TREperformance.com
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Flotek Cylinder Head, Assembled, 2.020/1.600 in Valves, 180 cc Intake, 64 cc Chamber, 1.460 in Springs, Straight Plug, Aluminum, Small Block Chevy, Each (102-505)
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World Products 043650 – Cylinder Head Cast Iron Chevy Small Block S/R 170cc 67cc 23Degree 1.940″ x 1.500″ Straight Plug 87 and up. Bare Casting – Bill Mitchell Products
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