port my 317's or get aftermarket head?
#12
youll have a hard time hitting 450 w/o going l92. ive got pretty much the same set up w/ katech stage II 241s. im hoping for 400 i dont see any heads adding 50 more hp. 400hp would be a more resonable goal w/ a decent set of heads.
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GrooveCityZ71
GM Engine & Exhaust Performance
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Aug 31, 2015 12:05 PM
sauldgold
GM Engine & Exhaust Performance
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Jul 23, 2015 02:15 PM



I can't agree more on that one!

