I know its not really a technical question, but i see a lot of catback exhaust systems out ther. I hear apexi N1 is really good and the greddy Japanese spec is better. What are some of the best one's to get for the price?

 

N1 is loud.

Most people get the Racing Beat. Excellent construction, US based company, good sound, good performance, doesn't look like a rice cannon so cops shouldn't bother you.

There are few long threads in the 3rd gen forum on the topic of exhausts if you want to research them

 

+1 for the RB dual tip. I have the Greddy SP which I actually think sounds and flows better. Great contraction and materials but it's grapefruit-shooter sized rolled tip is decidedly NOT stock.

 

+1 for RB dual tip. N1 single or duals are LOUD. In the end I think you'll find it will all come as a matter of preference for you (looks, sound, performance, rarity, etc). All will provide decent gains, none "really" overly better than another.