I want to replace the original Muffler on my 88 GW. I have heard Flowmasters are good. I want something that will help with fuel economy but not real loud. I will remove the catalytic converter. Any suggestions??
I replaced mine with 2-1/2" all the way back, no Cat, 14" Flowmaster Super Turbo muffler. Has a nice older truck rumble, and really roars when you romp on it, but is still ok for the forty mile daily commute. I hope that helps