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* CNC-ported by Lingenfelter Performance Engineering, benefiting from years of experience in GEN III performance modifications
* Designed for 1997 and later GM LS1 and other GEN III engines, including 4.8L, 5.3L and 6.0L V8s.
* 65cc combustion chamber retains the stock compression ratio for bolt-on convenience
* Available bare or fully assembled and ready to bolt-on with high-quality stainless steel 2.02" intake and 1.57" exhaust valves.
* E.O. number pending