*change headline to this topic is exhausting *
I want to do long tube headers. Buy the pacesetter kit with the y pipe.
My truck is emissions exempt, so I only need something that looks like a catalytic converter. I can't find any info on what needs to be done at the back end of the y pipe in the way of o2 sensors and if there maybe there is a resonator or muffler that resembles a cat. Also dont want ant CEL coming on. I want do this right. Any points in the right direction is appreciated.

 

Here's a fake cat:
http://www.siliconeintakes.com/dsm-i...ter-p-320.html

Use MIL eliminators to avoid CEL from O2 sensors.
http://www.magnumtuning.com/en/detai...am-1500-pickup

 

Either that, or just put a high-flow cat in there......

 

I ordered that one that looks like a cat. I think a problem I'm gonna run into is there is only one bung of the upstream o2 sensor, the long tube and the y pipe from pacesetter eliminates the downstream bung. Am I gonna have to get a tune to kill that sensor? Or is there something else.

 

Could just have an exhaust shop weld in another bung. Probably have to use the non-fouler trick to prevent it from setting codes though.

 

Yeah that's not a bad idea. I think they recommend to get a tune after your put long tubes on so I might just get a tune and delete those download stream sensors.
I've read some ppl say the front drive shaft hits the pipes, I'm really nervous about that even though I read it's more of an issue with stock ride height and lowered trucks.

 

It is close at the collector... you can dent the collector a little to gain clearance... it has no effect on performance.

 

This is a picture of the clearance on my truck. Those scratch marks aren't from the clamp. Just happens to have scratches right next to the clamp