I recently installed the JacFab ported intake manifold & 80MM TB from Overkill.
Will sent me a re-tune for the extra air flow as well. Huge difference in my opinion. I already had the GMPP CAI and Overkill tune to 93 octane. But this was a nice jump in power. Gotta work on my 0-60 now cause I'm roasting the 285's with the nanny's turned off at launch. manual trans. I haven't dyno'd the car but I've gotta be up about 40-50hp in total. 380ish crank I'm hoping.just over 300whp maybe. still haven't tried E85 yet though I've got the tune for it already. That & exhaust are the only NA options left on the table at this point. Wanting to go Overkill stage 2 next year I hope!
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