im planning on getting the hahn 3inch catback. but im not sure what downpipe to get, with or without the cat.

zzp and over the top performance have the cheapest. I'd go w/out cat.

im planning on getting the hahn 3inch catback. but im not sure what downpipe to get, with or without the cat.

Most go cat less.

Be sure to check out www.TurboTechRacing.com we carry all the Hahn items.

Most go cat less.

Be sure to check out www.TurboTechRacing.com we carry all the Hahn items.

hahn catless > all.
Why be cheap, if you want the performance go all the way.

What is a full Hahn exhaust system add as far as horsepower compared to the competitors? I want a link to see the proof =D.

stock we have 2.5," most aftermarket are 3" and they don't add much, most tuners (from what i hear) add like 5whp.

What is a full Hahn exhaust system add as far as horsepower compared to the competitors? I want a link to see the proof =D.

Hahn has dyno charts on their site. It is one of the best exhaust for adding power, compared to others. You can expect 12-20 HP from a 3" exhaust on the SS

^^ I think you guys are a great sponsor and Hahn may claim that much but its been proven over and over again how little horsepower a catback will give the LNF. Now, for sound and quality, Hahn would be a good option.