Has anyone installed one of these? I have a 2011 MR that I recently installed a ETS Quiet CBE and AMS high flow cat. I cannot get the stock downpipe and AMS cat to stop leaking. I started looking at the prospect of installing the AMS DP, but the horror stories of removing the stock O2 housing turned me off to that pretty quick. Replaced the gaskets, twice. AMS initially sent me bolts that were FAR to short. It really frustrated me, but they were cool about it and sent the correct bolts with new gaskets. I figured it would fix the problem, but it didn't. I'm realizing that it can work, but the two flanges must line up perfectly. I know the downpipe won't really increase power, but it will allow me to have all flanges be 3" and remove any leaks. I'm having it tuned by AMS in two weeks and use this as my daily driver, so needed something fast. Figured a downpipe that uses the stock O2 housing would be the path of least resistance. I unfortunately cannot find a thing on it. Need to know what I got myself into. Any assistance would be great. Thanks

 

What kind of gaskets? I know Grimmspeed makes a 2X thick 3" exhaust gasket, but I don't know if that will fix your problem.

I've got the same issue --- small exhaust leak between my TP/Stock DP and TP/CBE. I'm using Vibrant gaskets, but they don't seem to be doing the job. Thinking about ordering the GS gaskets.

 

Using the Vibrants as well. I'll check out the Grimmspeed ones, but not sure they'd help. Seems inherent to going form 2.5 diameter to 3 inch. I'm hoping that the downpipe will fix, since it uses the stock doughnut connection at the O2 housing and has a 3 inch diameter to match the AMS cat. Just nervous about install with all the issues I hear about DP removal.