ZR-1 Net Registry Forums - View Single Post - Headers , Exhaust and emisions in Colorado

mike100 · 02-16-2014

I did something similar, but I used oem catalysts because I think they use a lot more precious metals(platinum and palladium) in the substrate than universals. I have yet to run my car on a gas analyzer since putting the LS7 cats on the end of my long tube headers, but it passes the smell test for sure. The air injection was also retained to help light them off sooner.

02-16-2014	#3
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Headers , Exhaust and emisions in Colorado I did something similar, but I used oem catalysts because I think they use a lot more precious metals(platinum and palladium) in the substrate than universals. I have yet to run my car on a gas analyzer since putting the LS7 cats on the end of my long tube headers, but it passes the smell test for sure. The air injection was also retained to help light them off sooner.