I had an SLP Cat Back installed on my 07 GT last week. The OEM resonator was removed. I was a bit skeptical of deleting the resonator, fearing I would experience raspy obnoxious sound within the cabin. The installer told me if it was the sound quality was overwhelming he would put it back on. Well it really hasn't been that bad at all. My exhaust on idle has a low deep tone, upon acceleration it sounds pretty hefty but still not to overbearing. I kinda feel like getting a header for this car. Anybodt have any suggestions on a good header that will mesh with this year model car and Cat Back application. I am not just interested in gaining more HP or enhancing sound but also gaining some efficiency in dissapating heat from the engine. I live in SE Louisiana and engines as well as Trannys go to early graves because of the intense heat throughout most of the year. When I change my coolant I am definitely going to a 180 T-Stat maybe even a 160. I've heard about this Power Log. From what I can see it really isn't a header per se, but a ported more efficient version of a OEM Exhaust Manifold. Would the Plog be a good choice too. Anyway would appreciate some opinions, insights to help me decide.