Really, it doesn't throw any codes? You're talking about the one right before the muffler right? Since I took my muffler completely off and added a Y in it's place...I wonder if removing that cat would throw codes?Dustinmc15 said:I have an 03 and it had 3 cats, two small pre cats right after the manifolds and a 3rd main cat downstream. I got rid of the 3rd cat and it doesnt throw any codes and still passes emissions.
If you are running the pipes all the way back to your Cuda bumper i'd say you'd have enough pipe for the needed backpressure to build.AP said:I wonder what hp gains I will get and sound wise. Since I added the Shaker, I noticed a slight hp gain, throttle response and sound. Will back pressure be an issue by removing the 3rd cat since I have no muffler? Thanks!
If you are wanting true dual exhaust, you need a H or X pipe..... a Y pipe blends the 2 headers into one exhaust pipe, look at the shapes of the 3 letters X, H, Y... self explanatory.BXER1 said:Will be replacing the OEM two small cats and wye pipe with a new wye pipe ( Magna Flow) High Flow cats,two magna flow stainlees mufflers which should make this a true dual exhaust.