[green724x4]

beware of dyno max the are great on mostly stock or a lower compression motor like at most "9.5:1" or lower. I have a built big block in my 4x4 with a mini huffer on it so, my guess is like 10:1. I have never heard so many complaints of a ****ty sounding exhaust. We just broke in a 455 buick with a cam , intake, headers and 9.0:1 with dyno max turbo mufflers and they are quiet. I am looking into series HD flows or 70 series big block flows or possibly magnaflow 5"x 11"