Does anyone have any information here about the Mac Prochamber? I just bought one about 2 weeks ago and I am not liking it. Let me expain. After installing it and driving it, I noticed a big loss of low end, and cant say I noticed anything in the top end. Throttle response went to shit too. Well, I fiugred since I had a fairly modified car in which I had my Diablo chip Dyno tuned, it must need to be re-tuned (262 RWHP and 288 RWT). After fixing the initial exhaust leak at the drivers side header, I continued to notice what sounded like and exhaust leak, but couldnt find anything. I only notice it when the car is under load. Today I started the car, and I had a leak once again at the driver side header. I could smell exhaust fumes in the engine compartment. I loosened all the connections and readjusted it, making sure all was lined up. Tightened everything back down and started the car again. The sound was much less, but I could still smell exhaust in the engine compartment. The engine also shakes a little after initial pedal input when the rpms start to rise. I am at a loss here. Do you think I might have cracked the header? Maybe I should just go with longtubes and a shorty witch cats. Any help here would be greatly appreciated.