Hekimian Racing Engines, LS3 Aftermarket performance heads, 257cc intake,73cc exhaust, 336 cfm @ .600" intake port, 222 cfm @ .800", Manley NK-842 Stainless 2.165" / 1.590" valves with 8mm stems,Bronze valve guides1.265" Chrome/Silicon Liberty valve springs good to .625" max cam lift, 4140 Moly 7^ retainers, Manley Hardened 7^ bead locks, Clad / Viton (r) valve seals, Howards hardened steel shims, Flow data sheet available.
Sold as assembled pair. These head are capable of producing 672 HP with the right engine parts and build.
Expires on: 01/05/2017
Posted: 10/13/2016, ad expires in 73 days
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