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Untitled DocumentView StoreFeedbackChevrolet Performance LS9/ZR1 Camshaft (12638427) Kit w/ BTR Dual Spring Kit The factory LS9/ZR1 camshaft is a popular economical cam upgrade for forced induction LS combinations. This cam has excellent driving characteristics, while offering a very notable increase in power vs. factory NA LS cams. Cam Specs: Duration @ .050" 211/230 Lift .562"/.588" 122 LSA This cam will work on all Gen IV engines with proper springs. Gen III engines require a Gen IV timing ch...

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