I have a 216 228 with a 114 lsa and 500 lift...I have AFM on my truck, so i limited lift to 500 at the valvesWhat cam are you using? What kind of HP and torque? Sorry for the hijack. I have used Magnaflow on my Suburban and had no cabin drone .
My friend has one, but its too loud for me. In and outside....He loves it and thats more importantHas anyone tried the the OEM stuff? I know GM has a performance and touring system for around the same price. I just like staying with OEM products.
I didnt tune at first, but my mileage was garbage, 1 3/4" kooks with cats and a 3.5" flang...Now its very decent...But i would like to see more...I am between 15-25mpg. And i love it when i am pullin my 4,000lb boat and it drops into 4 cylinder mode...also do you have to retune the ECM with the new headers and exhaust or does it run fine on stock program?