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I finally found according to the GM performace catalog that the LSA springs can only hold a max lift of .520 which is not enough for the ls9 cam. The LS9 springs according to my research are the same as LS6 springs,
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2013 ZL1 Roto-fab cai, Apex catch can, Vmax LSA throttle body, Roto-Fab heat exchanger res, ATI balancer with 5% overdrive pulley, Stainless power 1 7/8" long tube headers.
Last edited by Fast92RS; 01-23-2014 at 03:46 PM.
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