I have the Motordyne TDX2 exhaust with ART pipes instead of cats. I know that it won't pass emissions in Colorado as-is. I talked to Tony and they have a set of pipes that replace the ones closest to the rear of the car and have cats built into them. The cats have 250 CELs / square inch (compared to stock of 400-500).

I'm wondering if anyone has put these on and passed emissions and, more specifically, if they have passed emissions in Colorado. I don't want to swap my ART pipes to stock cats just to pass emissions...

Thanks!

 

How strict is Colorado? Here in Cali. it might pass the sniffer test but if it doesnt pass the visual...fail!!!

If you concerned and dont want to swap at emissions time I wouldnt mess with either. Leave the stock cats there.

 

They have a machine that puts your car up on rollers and they drive for a certain amount of time with something connected to the exhaust. They do a visual test here, but with how low my car is and their lack of knowledge, it won't matter.

 

Give it a shot and let us know!

That would be awesome if it passed