Review on TOTALFLOW 642 Muffler Overall Diameter by Matt Kim

Muffler quality is excellent for the price. Can't expect more from him. I'm currently dealing with a typical 4-barrel stiffness issue with a straight muffler, which isn't this product's fault, especially since I went with such a short (7") version. I've been experimenting with this and a straight pipe with just tried this muffler but it's too much rasping no problem although i will add a resonator to help it and it should be fine sounds really good at 3000rpm especially idling with the big cam of this engine.Without a resonator, it also has a lot of hum, which is to be expected from any such muffler (if that's the only thing in your exhaust system).