I've seen/read mixed reviews about catted DP's that cause a check engine light because they cannot convert emissions as well as the stock downpipe. Is there hard evidence as to which aftermarket DP's are good enough to not throw codes?
Here are the options available. I'm leaning towards Wagner at this point:
- AFE: $795
- AR: $805
- CP-E: $1034
- VRSF: $475
- Wagner: $790
- Cobb: $850
I just installed a VRSF catless DP and and it's a little too loud for me, too much drone, and the smell isn't great either. I have factory performance exhaust.