my friend said he could make me one but will i gain or lose power from this? he said that sometimes you can lose power with tb spacers so told me to ask a forum if they would gain or lose power. this is technically free just need to buy gaskets so cost aside do they gain power?

 

dyno is the only way to tell, but my sources say no

 

I have one (Airaid) in my 94' Si (D15B swap), and I definately think it gave me more power, I agree a dyno will tell. The mid range acceleration is much better, plus I get another 1 - 2 miles to the gallon with general driving in mind.