Advice on cutting the stock diffuser for quad tips

335m · 10-22-2014, 01:17 PM

Great work man, I am definitely interested in doing this as well.

Mind posting some close ups? (zoom in on the fitment of the tips in the diffuser and the extra space around them)

polskatomek · 11-11-2015, 06:42 PM

I just found this thread since I bought a replica M-tech rear bumper with the same stock diffuser you cut, and I was wondering what you used to cut into it before smoothing the edges with a dremel? I'm worried that if I use a hand-held razorblade knife it will easily slip and cut too much..

Dan_Q · 11-17-2015, 10:33 PM

Quote:

Originally Posted by polskatomek

I just found this thread since I bought a replica M-tech rear bumper with the same stock diffuser you cut, and I was wondering what you used to cut into it before smoothing the edges with a dremel? I'm worried that if I use a hand-held razorblade knife it will easily slip and cut too much..

Probably quite a few things could work but I used something like this http://www.amazon.com/Rockwell-RC510.../dp/B004C3BUAA

polskatomek · 11-18-2015, 09:19 PM

Quote:

Originally Posted by Dan_Q

Probably quite a few things could work but I used something like this http://www.amazon.com/Rockwell-RC510.../dp/B004C3BUAA

Thanks, I actually used a circular grinding bit on a Dremel for the big chunks of the cutout, then a small rotary bit for fine tuning and smoothing of the edges for the final stage. It's hard to see the details in this picture, but here is my final result:

Ali-E90 · 11-19-2015, 09:06 AM

These all look really nice! Kudos to you all!

Something I may consider in the future, a bit harder for me coming from:
a) an N52 with no muffler or piping on passenger side
b) stock non-sport bumper without a diffuser (though maybe that's worth an upgrade before proceeding with this)

chandleerr · 11-19-2015, 12:03 PM

Quote:

Originally Posted by Ali-323i

These all look really nice! Kudos to you all!

Something I may consider in the future, a bit harder for me coming from:
a) an N52 with no muffler or piping on passenger side
b) stock non-sport bumper without a diffuser (though maybe that's worth an upgrade before proceeding with this)

Hamaan makes a piece for quads for stock rear bumper so when you cut your stock bumper to fit it covers it up

10-22-2014, 01:17 PM	#23
335m Major 134 Rep 1,166 Posts Drives: 08 e92 M3 Join Date: Jun 2014 Location: Austin Texas iTrader: (1)	Great work man, I am definitely interested in doing this as well. Mind posting some close ups? (zoom in on the fitment of the tips in the diffuser and the extra space around them) __________________ 2008 e92 M3: Gintani Sport w/ Topspeed Catless X-Pipe, KW-V3
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11-11-2015, 06:42 PM	#24
polskatomek Private First Class 21 Rep 154 Posts Drives: E90 330i Join Date: Oct 2014 Location: Canada iTrader: (0)	I just found this thread since I bought a replica M-tech rear bumper with the same stock diffuser you cut, and I was wondering what you used to cut into it before smoothing the edges with a dremel? I'm worried that if I use a hand-held razorblade knife it will easily slip and cut too much.. __________________ E90 330i - Alpine White - 6MT - ZSP - 35% Llumar tint - OEM front splitters - Kerscher CF front lip - BMW CF performance trunk spoiler - matte black grilles - LED angel eyes - AA downpipes - AA tuned - MTech rear - charcoal delete - aFe Pro Dry S
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11-19-2015, 09:06 AM	#27
Ali-E90 Colonel 387 Rep 2,377 Posts Drives: 2007 E90 323i (Cdn) Join Date: May 2013 Location: Toronto, Canada iTrader: (3) Garage List 2008 BMW M3 [8.00] 2007 BMW 323i [8.50]	These all look really nice! Kudos to you all! Something I may consider in the future, a bit harder for me coming from: a) an N52 with no muffler or piping on passenger side b) stock non-sport bumper without a diffuser (though maybe that's worth an upgrade before proceeding with this) __________________ Check out my Mod Thread Here
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