Borla Racing pipes installed

enrita · 10-02-2009, 11:09 AM

Wow guys dont buy Borla pipes... the connection to the downpipes is smaller than stock pipe and really badly done. see picture... I now have to custom weld something there to at least match the OEM diameter. i think the Borla is 2 inches only at the connection.
Stay away from those.
Totally catless with Bastuck you get a good sound but raspy from 1700-2200 Rpm. not very happy might put back the stock pipes.

luca335i · 10-02-2009, 11:12 AM

Why not just cut your second cats off and stick with the stock piping. I think axleback exhausts are a waste of money. 1500 for two mufflers is a rip off.

Mr. 5 · 10-02-2009, 12:13 PM

This is strange. I knew that the inner part of the piping was a bit smaller but I didn't think that it was 2".

Just go with the AE exhaust and they'll mate up fine with the DPs.

enrita · 10-02-2009, 12:28 PM

Quote:

Originally Posted by Mr. 5

This is strange. I knew that the inner part of the piping was a bit smaller but I didn't think that it was 2".

Just go with the AE exhaust and they'll mate up fine with the DPs.

is not only that they are smaller. The flange is not free, basically they made the pipe smaller, put in the flange and soldered it. That is going to create lots of turbolence and back pressure... Will custom weld it next spring or just put back the stock exhaust.

Topdog228 · 10-02-2009, 03:57 PM

Did you find any leaks? I can see the that creating turbulence.

TurboSid · 10-02-2009, 05:23 PM

interesting time to post this. was seriously considering borlas.

Looks like im in the market for exhaust.

enrita · 10-02-2009, 05:29 PM

no leaks, but how can they make the connection to the downpipe even smaller than stock??? Really bad. I am looking now at the Rennart resonated Cat-delete pipes. Will see.

Topdog228 · 10-02-2009, 05:30 PM

Quote:

Originally Posted by enrita

no leaks, but how can they make the connection to the downpipe even smaller than stock??? Really bad. I am looking now at the Rennart resonated Cat-delete pipes. Will see.

+1

Makes no sense to make the pipes smaller than stock. Kinda defeats the purpose. Resonated mid pipes would sound the best since it'll help with eliminating rasp. Or even catted mid pipes.

Got Rice? · 10-02-2009, 10:32 PM

Quote:

Originally Posted by enrita

no leaks, but how can they make the connection to the downpipe even smaller than stock??? Really bad. I am looking now at the Rennart resonated Cat-delete pipes. Will see.

great choice! i love my Rennart resonated exhaust sounds great with my stock dp.

10-02-2009, 11:09 AM	#1
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	Borla Racing pipes installed - what the hell! Wow guys dont buy Borla pipes... the connection to the downpipes is smaller than stock pipe and really badly done. see picture... I now have to custom weld something there to at least match the OEM diameter. i think the Borla is 2 inches only at the connection. Stay away from those. Totally catless with Bastuck you get a good sound but raspy from 1700-2200 Rpm. not very happy might put back the stock pipes. Attached Images __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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10-02-2009, 11:12 AM	#2
luca335i Major 57 Rep 1,193 Posts Drives: 335I Sedan Join Date: Jan 2008 Location: Unknown iTrader: (3)	Why not just cut your second cats off and stick with the stock piping. I think axleback exhausts are a waste of money. 1500 for two mufflers is a rip off. __________________
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10-02-2009, 12:13 PM	#3
Mr. 5 Modder Raider 759 Rep 8,633 Posts Drives: M3 Join Date: Apr 2007 Location: Surf City, HB iTrader: (31) Garage List 2007 e90 335i [8.00]	This is strange. I knew that the inner part of the piping was a bit smaller but I didn't think that it was 2". Just go with the AE exhaust and they'll mate up fine with the DPs. __________________ e36 M3 Coupe, e36 325i Sedan e90 335i--SOLD Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
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10-02-2009, 03:57 PM	#5
Topdog228 AW for Life! 0 Rep 28 Posts Drives: 2008 E92 M3, 2007 335i Join Date: Oct 2009 Location: Santa Barbara iTrader: (0)	Did you find any leaks? I can see the that creating turbulence.
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10-02-2009, 05:23 PM	#6
TurboSid Brigadier General 1114 Rep 3,261 Posts Drives: 2022 M4Cx BSM/FR Join Date: Apr 2008 Location: Florida iTrader: (4) Garage List 2008 335i [0.00]	interesting time to post this. was seriously considering borlas. Looks like im in the market for exhaust. __________________ 2022 BSM/FR M4 Competition X-Drive 2017 MW/SO M4 ZCP [SOLD] • 2015 MW/SO M4 M-DCT FBO [SOLD] • 2011 AW/CR 335is DCT FBO [SOLD] • 2008 AW/CR 335i 6MT FBO [SOLD]
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10-02-2009, 05:29 PM	#7
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	no leaks, but how can they make the connection to the downpipe even smaller than stock??? Really bad. I am looking now at the Rennart resonated Cat-delete pipes. Will see. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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