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grocerygetter · 02-22-2014, 09:13 AM

I respect callaway. But, I'd take a 615-630 horse NA heads cam exhaust build over it anyday. GPI did a z06 vette and posted a while back with those numbers. Easily done on the ls7.

02-22-2014, 09:13 AM	#31
grocerygetter instigator Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010 Location: 72034 Posts: 3,979 View My Garage	I respect callaway. But, I'd take a 615-630 horse NA heads cam exhaust build over it anyday. GPI did a z06 vette and posted a while back with those numbers. Easily done on the ls7. __________________ -John S.