Quictimeperformance makes certain claims on their site that had me very interested. I also spoke to the owner on a few occasions and he really seems to know his stuff. I want to know who has these headers installed and what gains have they seen on dyno sheets. My car is lowered so some of the other headers are not an option for me. Before I go spend about a grand on headers I want to know if there is proof of these claims. My next mod looks to be a cam and about 30 days after that headers. I was looking at the Macs simply cuz of price.