I have an ITR 00'. Guess il start off with my only mod right now which is a custom CAI.

From reading through the articles it seems like a 2.36-2.5inch exhaust straight through or twin pass muffler would suit my needs. Im staying all N/A with boltons.

Ive been looking at the tanabe racing medialion, and maybe the apexi world sport. My buddy has that on his LS and its pretty damn quiet but it has a chambered design.

Gains? Well im not sure. Since i am running a b18c5 wouldnt i want it in my current powerband? (mid-top end)

Um only other thing i can think of is the sound. I understand( i think) that the straight through exhausts are a bit louder. I dont want something that sounds like a weed eater. Most of all im really just looking for something with the best gains. Not sure about price range, im still looking.

Thanks