There are 3 main exhausts for our cars and then custom.
1) Nismo - Cruising and jumping on it is louder than the Stillen, but in everyway, it's just a beautiful system. Probably the best system overall for sound and performance. Difficult to find, but nobody here EVER gives theirs up.
2) Stillen - True Dual, sounds great, cruising is very quite( quiter than nismo and invidia) and has a nice sound when you jump on it. Probably the best exhaust if you plan to go FI. But nothing wrong with using it without FI. Easy to find, but seems to have surface rust issues back east where it's wet and they put salt on the roads. Only surface rust, but it does take away from the looks.
3) Invidia - Sounds great, has tendancy to drone, very well made and customer service is great. As stated before, our contact here is Gordon.
4) Custom - Some people have taken off the muffler portion and put in a flowmaster muffler. Sounds mean, but a little too loud for my taste. There are a few aftermarket y pipes ( kukamei, motordyne, megan) and any muffler shop can do the midpipe.
Tapatalkin'