Originally Posted by future370zzz

Yeah, the base kit at 8psi you're probably looking at 380whp-440whp, depends on octane and supporting mods. The GTM Stage 0 kit is around 410whp (91 octane & stock exhaust) but with better torque #s that is equivalent to the Stillen if GTM ever gets CARB approval. People have gotten up to 440whp on 93 octane/catback/hfc though on Stillen kit.

Dynos can vary. I wouldn't be worried about the #. Focus on the change in #.

Just building the parts list right now but plan to upgrade injectors, pulley, impeller upgrade, test pipes and custom tune to get up to 11 or 12 psi for a goal of 450whp on 91 octane for a semi CARB legal system. A 100 octane tune is an option too. Got the CARB sticker already so. Everything I just said is hypothetical so it should not be used against me in a court of law.

You need to figure out your power goals ASAP and how much hassle you can deal with (popo) otherwise it will cost more in the long run. Need to think about additional $$$ to support the car as you push more HP/TQ. 550whp/450tq is great, just plan to replace/reinforce stuff at a faster rate.