Okay i have a 04 5At coupe i have already done the Plenum Spacer, ZTUBE, and Hks hi power Exhaust. Not Enough. I Need more power. I was think Proformance pulleys, and 3.7gears. What other mods can i do you gain power without f/i? Any input would help.


On a side note; is it possible to reach around 400hp without f/i in our cars?

 

Haha hell no. 300whp has only been done a handful of times. 400 is pretty much impossible..I mean the only way would be to bore it the eff out, but I don't even know if there's enough extra cylinder wall to safely bore it out enough to reach 400hp. You'd have to stroke it and bore it to hell.

 

What's next you ask? Use the search button I say.......................

This topic's been covered ad nauseum on the forum for years.