Edited: 3/15/2006 3:26:43 PM by Wakeboard03S10
on my tahoe with a vortech 350 stock it was geting 13/15mpg and now with all the work ive done....dual flowmaster 40serries mufflers, removed both cats, installed a magnaflow corvette X pipe and installed a k/n air filter, new plugs and plug wires and adjusted the timeing a bit... now I get 15/17 in it...But I have the 02 Sims.