[TTID]

Hi,

I've got a 2013 F31 320i. I've been running BM3 stage 1 for almost a year now, with great results. However, I would like a bit more oomph.

I haven't planned to put too much money into it, but following the stage 2 recipe in the BM3 app, I require a full exhaust & upgraded intercooler to carry on further.

The problem is that for most exhaust I find on ebay, the shipping cost would be the same as the cost for the exhaust. I seem to however have found a workaround solution, if possible.

Does anyone know if an aftermarket 335i/435i exhaust would fit with just replacing the rear diffuser?

The exhaust I'm planning on buying is this:
catback
downpipe or a wagner branded one

Coupled with a chinesium intercooler or a wagner branded one

Any ideas if this would work bolt on?

[MaverickCruise]

Originally Posted by MaverickCruise

Some of my experience, I used N20 with N55 exhaust pipe
The Bracket, rear muffler right is different and needs to be replaced with 335I parts.
If you use the B58's muffler, then the Bracket, rear muffler left is different, not the right.
Otherwise it will cause some deviation in the muffler, of course, there is no problem if you are not pursuing perfection.
There is also a front PIPE that needs to be cut and replaced with N20, which is the red line in the picture. You need to pay attention to the position of the silencer when welding, if you want to get a perfect effect, instead of protruding on one side and recessing on the other.

https://f30.bimmerpost.com/forums/sh....php?t=2068799

[MaverickCruise]

In my opinion, if the fuel quality is not good, the 20i stage1 and stage2 will not improve much, but the risk will increase a lot.
Replacement with larger intercooler helpful