Can anyone tell me about the procharger f1a cog race. Its one of my choices when I start the build of the motor. I have never heard one in real life, only on youtube. People say its loud, but that dont matter to me. I really dont want turbos, right now my choices are the kb 2.8lc mamoth or the f1a. does anyone have a f1a, and what do they sound like in real life. I've got a 04 co cobra that Im working on. Any help please ? THANKS