im having trouble with somthing, i will look at one website that says the less presure for the exhaust the more power.. another site will say more back presure the better.. WTF!! haha so thats my question ;P more=better or less=better

 

The only thing the less pressure is better applies to is Turbo'd cars

 

ok thank you

also anyone here from AZ? cause im looking for a turbo install shop in this state and cant find one..

 

Look up kopperhead customs on craigslist he's good and good pricing as well.he's in Mesa Chandler area though.for all motor 2.2 I would go 2.25 exhaust. Forced induction 2.5 and up