I am thinking about getting the Hahn Max Flow Downpipe, but it doesn't seem to be a popular downpipe as compared to other options out there, such as ZZPs. For those that have this dp, how is the quality of it? Have you all had any problems with the welds, cat, or flex joints? Without using HPT to disable the 02 related codes, are 02 related coeds a common occurance with this dp?

 

I'm looking to possibly put this one on. It's the highest quality DP you can get and , from what I understand, NEVER throws a CEL. Yes..it's about $150 more than most. My take, if you need a CATTED pipe that is *guaranteed* not to throw a CEL, paying $150 extra for the best is not a deal breaker.
BTW, don't bother if you're not tuned. I already have HTP tune, but I don't think it will be a problem for me at all. If it was CATLESS, I would probably get it tuned after install.

 

either way in cali ronn there illegal so mine as well get the catless one lol

 

I will pass...they only give a quick look and don't know sh##t about our car. Just looking for cat. If it passes OBD and sniffer you're done. I've done this before. Will pass OBD and pretty sure the sniffer. If not, the stock pipe goes back on for the test and you were right. I'd rather pass then have to swap, we'll see in a couple years (just got it registered in June).

 

I have the hahn maxflo catcon DP. I love it! smooth out the exhaust note compared to my gutted stock DP. everything fit perfectly with no install issues whatsoever. as far as throwing codes i have a tune that knocked this sensor out but ive heard that hahn's DP is the only one that doesnt throw a code due to the way they installed the bung for the O2 sensor.