i had a k/n filter on my tahoe that was really small about 4 4 inches round and 5 inches long. I was getting worst gas milage than i was with the stock filter so i put a big huge filter on from autozone and my throttle response and gas milage went up. I would think more CFM the better, more airflow.
yep i had to run a filter about that size on my 5.7 ram for about 1 week till my new one came in cause i made a hole in it and that little filter didnt carry enough flow even though it said it allowed enough it didnt my truck was acting all kinda stupid with it, i would look into the longer one that came with the kit should beable to find it at the autozone or autoparts store.
A forum community dedicated to GMC and Chevy full size owners and enthusiasts. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more!