N55 mids vs cutting out cats on n54 mids?

NWillard77 · 11-20-2013, 04:30 PM

Whats the difference?? Piping looks the same diameter. Same bends. Looks to be the same everything minus the cats. I can have this done for $100 rather that $350 on parts for n55 mids. Why dont i see anyone thats done this?

ShocknAwe · 11-20-2013, 06:13 PM

Ruins your stock midpipe. Most don't do it since they keep the stock parts just in case. Same reason most people don't gut their downpipes.

BostonBeemah · 11-20-2013, 10:25 PM

i gutted mine myself and its was honestly not bad at all if your handy and have the tools to cut and weld. If i were to do it again, i would just cut them out and weld in straight pipe though to cut down on the turbulence creating from the expanding and constricting of the exhaust gases which "may" lose power and just make it look cleaner..

NWillard77 · 11-21-2013, 08:57 PM

Thanks! That will probably be my short term plan. i dont ever really keep stock parts anyway. Long term is a full berk sport exhaust.

TwinTurboed · 11-21-2013, 09:54 PM

I did this for 100$ at my local exhaust shop, cheaper if you don't care about being stock.

RimasRS · 11-22-2013, 07:12 AM

oem look no welds smooth and cheap upgrade

Lmaiuri · 11-22-2013, 11:36 AM

I gutted my cats and welded on a straight pipe. Drone will come into play, but it sounds so raw I rarely complain. Also, will smell like a muscle car from the 70s.

11-20-2013, 04:30 PM	#1
NWillard77 Second Lieutenant 13 Rep 258 Posts Drives: 2008 135i sparkling grey/red Join Date: Nov 2013 Location: North Shore, MA iTrader: (2)	N55 mids vs cutting out cats on n54 mids? Whats the difference?? Piping looks the same diameter. Same bends. Looks to be the same everything minus the cats. I can have this done for $100 rather that $350 on parts for n55 mids. Why dont i see anyone thats done this?
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11-20-2013, 06:13 PM	#2
ShocknAwe 1Addict 3233 Rep 7,893 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	Ruins your stock midpipe. Most don't do it since they keep the stock parts just in case. Same reason most people don't gut their downpipes. __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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11-20-2013, 10:25 PM	#3
BostonBeemah Lieutenant 72 Rep 524 Posts Drives: AW 135i 6spd Join Date: Sep 2011 Location: Belmont, Ma iTrader: (4)	i gutted mine myself and its was honestly not bad at all if your handy and have the tools to cut and weld. If i were to do it again, i would just cut them out and weld in straight pipe though to cut down on the turbulence creating from the expanding and constricting of the exhaust gases which "may" lose power and just make it look cleaner.. __________________ 2010 AW/BLK 135i VM 6465 Single Turbo, JB4 + MHD, VRSF CP & Tial, Big Tom, Fuel-It PI + Stage 3 + Return + Ethanol Sensor, BMW PE, MFactory LSD, Spec 3+ & MFactory SMFW, RB External PCV Best stock turbo 12.5 @ 19.46 spinning all the way down RIP 2008 AW/BL 135i
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11-21-2013, 08:57 PM	#4
NWillard77 Second Lieutenant 13 Rep 258 Posts Drives: 2008 135i sparkling grey/red Join Date: Nov 2013 Location: North Shore, MA iTrader: (2)	Thanks! That will probably be my short term plan. i dont ever really keep stock parts anyway. Long term is a full berk sport exhaust.
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11-21-2013, 09:54 PM	#5
TwinTurboed Turbo Power 49 Rep 364 Posts Drives: 135i Join Date: Dec 2012 Location: Somewhere iTrader: (0)	I did this for 100$ at my local exhaust shop, cheaper if you don't care about being stock. __________________ BSM 135i - CDV Delete \| Bilstein \| Eibach \| M3 FSB \| Whiteline
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11-22-2013, 07:12 AM	#6
RimasRS Colonel 85 Rep 2,438 Posts Drives: BMW X3 SD Join Date: Sep 2010 Location: Europe iTrader: (0)	oem look no welds smooth and cheap upgrade
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11-22-2013, 11:36 AM	#7
Lmaiuri Second Lieutenant 64 Rep 256 Posts Drives: 13' Sapphire Black M5 Join Date: Mar 2013 Location: Annapolis, Maryland iTrader: (0)	I gutted my cats and welded on a straight pipe. Drone will come into play, but it sounds so raw I rarely complain. Also, will smell like a muscle car from the 70s.
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