jonathan
Full Access Member
A few weeks ago I ordered the manifold back kit from summit racing and got it installed.first off it was a simple kit to install. The y pipe is 2 1/4 inch pipe into a 3 inch that runs until the cab then it steps up to 4 inch muffler and comes out into a 4 inch tail pipe with a 5 inch tip. It sounds awesome but after taking a 600 mile trip for Christmas I decided that its to loud at highway speed. I thought you'll would like to know this information