How strict is NOVA emissions with Hi-Flow Cats
 

Has anyone in the NOVA area had any problems with emissions testing that had Hi-Flow cats installed? I ask because I'm thinking about getting Stainless Works 3" Retro Chambered cat back with Hi-Flow cats, but i dont want to fail emissions. Any feedback would be helpful, thanks!

Bump! Great question ... I'd like to know also. :pop2:

From what I've heard and read, many hi flow cats pass the test, but if your shop does a visual you will most likely fail. To me though any rational mechanic would let it go if it passes the test. Who knows though. Why not ask a testing facility before you purchase them?

Don't ask anything it raises suspicion and you will definitely fail. Been there done that. If it passes sniffer they really won't be to concerned with visual.

I agree, I should have also wrote to ask a place that you don't actually take your car to.

Have many customer in the area, with long tubes and high flow cats that pass the emission test, so i don't see a problem. Although it will take a few drive cycles to it to go into the reediness test,

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Do those cars have a tune? I will be adding LT and high flow cats soon, but don't want to do the tune right away.

i was at a shell station in Alexandria getting an emission test on my 2010 Sierra, the first the thing the mechanic did was get on the floor and look to make sure I had a cat installed even before the sniffer was hooked up.