135I Exhaust diameter

Kheadley · 06-17-2019, 04:27 PM

What is the diameter of the muffler pipe? Before the dual tips on the n55 single muffler.
Is it the same size as the n52 (328xi) pipe?

katsooba · 06-20-2019, 05:21 AM

It is a 2.75" pipe

U can see if it is the same size by comparing the seal rings of the muffler and the midpipe on realoem.

houtan · 06-25-2019, 08:42 AM

Here are my measurements when I cut the pipe for the bmw pe y pipe. It’s actually ridiculously small which is why I went to a dual 2.25” to single 3.5” y pipe to muffler exhaust.

06-17-2019, 04:27 PM	#1
Kheadley Private 16 Rep 87 Posts Drives: 135i Msport 2013 Join Date: Jan 2018 Location: Canada, Saskatchewan iTrader: (0)	135I Exhaust diameter What is the diameter of the muffler pipe? Before the dual tips on the n55 single muffler. Is it the same size as the n52 (328xi) pipe?
	Appreciate 0 Tweet Quote

06-20-2019, 05:21 AM	#2
katsooba First Lieutenant 85 Rep 354 Posts Drives: bmw 135i Join Date: Apr 2012 Location: Israel iTrader: (0)	It is a 2.75" pipe U can see if it is the same size by comparing the seal rings of the muffler and the midpipe on realoem.
	Appreciate 0 Quote

06-25-2019, 08:42 AM	#3
houtan Colonel 706 Rep 2,444 Posts Drives: 2011 135i Join Date: Jun 2013 Location: socal iTrader: (17) Garage List 2011 135i [9.80]	Here are my measurements when I cut the pipe for the bmw pe y pipe. It’s actually ridiculously small which is why I went to a dual 2.25” to single 3.5” y pipe to muffler exhaust. Attached Images __________________ 2011 LMB 135i DCT Pure Turbos Stage 3 (PS3) dyno results for N55 Pure Turbos N55 Stage 2 (PS2) results, reviews, install tips and docs, pictures, etc
	Appreciate 0 Quote