Exhaust Bbk Shorty Headers W/ Bbk Catted X-pipe

As it's a catted H-pipe I don't think you'll have any problem with emissions. The BBK TL shorty headers produce a 5-7rwhp gain.

I've got BBK long headers and BBK catted X pipes with a Corsa exhaust. I bought my car with this set up (and more) but it sounds great in my 07 GT. I've not had an issue with emissions. You shouldn't if you go with cats.

You'll probably need a tune with the X pipes to keep the car from throwing check engine lights so you should see a nice gain there. Shorty headers will give you lower rpm gains while long headers will give you more mid to high rpm gains.