[DJMOJO]

I just installed my VRSF Catless DP on my 2011 N55 E90.

The sound and performance is awesome! I really cant say enough good things about it.

Ive put about 300 miles on the install at this point and have hopefully burned any residual oil or debris I may have put from my fingers on the DP itself during the install but I noticed that if I'm stopped and idling the cabin starts to smell like exhaust fumes.

Now I realize that the DP is catless and there will be smelly exhaust but Im worried that there might be a leak.

Is this normal?

I used the provided flange to the exhaust and tightened the C clip on the turbo and DP. I also notice the smell when I'm downshifting and breaking simultaneously.

When I'm on the highway or at speed the smell isn't there at all.

Thanks in advance!

[cjindna]

I had a leak with the supplied VRSF gasket and bolts that became very noticeable after about 1k miles. After swapping to a larger diameter bolt and the OEM gaskets I don't experience any smell in the cabin at all, hot or cold days, at a stop light or motoring down the road.

[aaron_]

I have a vrsf cast catless dp ready for install. Are the gaskets that came with it no good? Links for other gaskets and bolts I should buy to install

[Boosted2000Si]

The smell is very strong after the install. If your windows are down odds are you will be able to smell it if you are stopped for a little bit. If with windows up you shouldnt smell it at all.

[JLGM4]

Originally Posted by aaron_

I have a vrsf cast catless dp ready for install. Are the gaskets that came with it no good? Links for other gaskets and bolts I should buy to install

use OEM. much better that ones provided

[DJMOJO]

Wow great info guys, thank you all so much! Yes the windows are up and the smell is strong.

Is there a good place to buy the OEM gasket online or should i just go to BMW and pay retail? Also, what bolts should i use?

Thanks again!

[cjindna]

I apologize but I cannot recall the bolt diameter used in replacing the included hardware. I found the largest diameter bolt that would fit the existing hole in the original cat-back flange in order to ensure it remained as centered as possible on the DP flange.

Regarding gaskets, I picked mine up from ECS.

[DJMOJO]

Excellent info, I'll order the gasket and do a quick write up with info for anyone else with this problem.

[STR8-6IX]

ouch, smell inside cabin is not normal. I think you do have an exhaust leak.

as for gaskets, you dont have to waste your money on OEM ones. i heard that one from a hardware store (2, 2.1 inch) gasket will work just fine

cheers

[DJMOJO]

You are right, i have read in several threads, people say these cheap ones from autozone work well for 2 bucks a pop. Ill give them a shot before getting the OEM replacement.

Also, here are some specs i found while searching.

http://www.e90post.com/forums/showpo...4&postcount=14

DOWNPIPE HARDWARE

(2) M8-1.25 x 40mm DIN 931 Class 10.9 Yellow Zinc Cap Screw

(2) M8-1.25 DIN 934 Yellow Zinc Finish Steel Class 10 Hex Nut

(4) 5/16"/M8 Delta Protekt Nord-Lock Bolt Securing Washer/Pair (.530 outer exterior)