Im gonna be moving to TN the first of the year and the county I'm moving to has emissions testing. Now right now I have long tubes with no cats and a magnaflow and I want to pass testing. I was thinking two high flow cats off the headers into a 3" y pipe to a single in/out magnaflow. Do you think it will pass? I'm not sure if it's a sniffer test or visual, anyone in Hamilton county have any input? Does anyone have any pics of the setup I'm looking for with a 4x4 truck? Thanks

 

I would just get a shop to weld you in to cats. Them retune for them.

 

I hear what your sayin but I want to change the exhaust anyways because I only have 2.5" off the headers into a dual in single out muffler and I'd like to go 3" all the way

 

Single 3?

 

Yes, 3" off the headers to a y pipe and single 3" out the back