The downpipe is great. I am used to it now, but, I think the turbo spools a little quicker. It is really cool now that it is paired with the cat-back. Loud...
Unfortunately, I did end up getting a check engine light, and, Exhaust Depot says two other peeps have reported them. It goes off and on every few days, which is weird. Bad O2 sensor?
So, at this point, Jeff, I would tell you to get the Riss Racing DP, and they said if you get a CEL with their catted DP, they will give you their O2 sensor fix for free.