04 Cats

[TankTop]

So my 04 4.7's cats are going. No smog restrictions where I live, is there an alternative that will get me proper back pressure?

 

[t-man]

So my 04 4.7's cats are going. No smog restrictions where I live, is there an alternative that will get me proper back pressure?

Doug Thorley headers, custom made y-pipe and URD makes a plug and play unit so you don't get dash lights. This is what I plan on with mine as soon as I can gather the money. Use of good muffler will still give you backpressure. I like Gibson personally.
URD link: https://urdusa.com/store/Electronic...V8,-2005-2006,-Dual-Channel/product_info.html