These balance and complete my whole turbo back exhaust system.. nice rumble a must if you are looking to build your wrx up..

The quality on this part is excellent . You definitely get a deeper exhaust tone from these headers. It may be harder to notice depending on what your exhaust setup is. Install took about 2 hours and installed some other Perrin goodies while I had the turbo out (Perrin charge pipe , Perrin turbo inlet). Do not attempt to just take the nuts of the header to turbo off without applying heat. My car had 2000 miles on it during the install and those suckers didnt want to move without being convinced with some MAP gas, that being said these nuts will strip out very easily. Having a friend to help get the turbo/ exhaust manifold back in will also make this install a breeze. Overall excellent product and made some great numbers on the dyno.

This product is a must in order to gain the most out of the FA engine. As a person who installs all of my parts I would say this install was about a 7/10. While the install isn't necessarily hard, it is time consuming. The hardest part is just getting to all of your bolts and clamping your oil and coolant lines. Spray those header bolts a day before you begin and an hour before you start. Also, bring some elbow grease! Other than that I have had no issues with them thus far. The sound from my exhaust has gotten more "throatier" if that makes any sense, but didn't make things overly loud.