Which of the existing cat-back is a true bolt on

fedinand · 08-18-2007, 03:16 PM

Which of the current cat-backs don't involve cutting the exhaust? I think CP-E is a true bolt on any of the others?

Spool · 08-18-2007, 03:18 PM

What?

fedinand · 08-18-2007, 03:26 PM

Which of the cat-backs available can you just mount up to your car w/out hacking up/cutting the factory exhaust to make it fit. (I tried to edit the title, but couldn't change it).

sdwilly · 08-18-2007, 03:33 PM

From how I understand it, any exhaust that removes the 2nd Cat would be a "true" bolt on.

Spool · 08-18-2007, 03:37 PM

I haven't heard of any mass produced catback exhaust that requires cutting or hacking at it to make it fit. It bolts on.

fedinand · 08-18-2007, 03:49 PM

No, not cutting the aftermarket cat-back - cutting the existing 335 exhaust off...then putting on the aftermarket exhaust. Most exhausts that I have had allowed me to simply unbolt the stock cat-back and then bolt on the aftermarket cat-back. Most of the pics I have seen of aftermarket cat-backs here don't have a flange that would bolt up to the remaining stock exhaust. (I'm must be having a hard time expalianing myself).

fedinand · 08-18-2007, 03:52 PM

Quote:

Originally Posted by sdwilly

From how I understand it, any exhaust that removes the 2nd Cat would be a "true" bolt on.

Thanks. Aside from CP-E's exhaust, do you know which others eliminate the secondary cats?

Walked U · 08-18-2007, 03:56 PM

i understand what your saying.

Most aftermarket exhaust come either in a 1 peice or 3 inividual section exhaust.

all of them are bolt ons which bolt from the primary cat back.

Only time where youll have to cut anything off is when you only buy section 3, which is the muffler / tip part.

Im sure even if you get your exhaust custom made it can be a true bolt on.

Mine was made with 3 sections all connected by v clamps.

Driver72 · 08-18-2007, 03:58 PM

I believe almost all of them eliminate the 2nd Cat.
Borla is one of the few that don't eliminate the 2nd Cat.

fedinand · 08-18-2007, 04:02 PM

Thanks for the answers.

JWadle · 08-18-2007, 04:03 PM

I have been told by SuperSprint that their catback - including mufflers, X-pipe and S-pipe (eliminating secondary cats) - is a direct bolt on.

1clean335i · 08-18-2007, 04:08 PM

Borla, Ultimate Racing

wj4 · 08-18-2007, 05:36 PM

Quote:

Originally Posted by 1clean335i

Borla, Ultimate Racing

Borla requires cutting, but the Ultimate Racing is a true bolt on..no cutting needed.

Green-Eggs · 08-18-2007, 07:52 PM

RD Sport offers a cat back with either Quad tips or Twin tips

Let me know if you have any questions

wj4 · 08-18-2007, 07:54 PM

How loud is the RD catback with the dual set up? Looks loud

sdwilly · 08-18-2007, 07:56 PM

Quote:

Originally Posted by wj4

How loud is the RD catback with the dual set up? Looks loud

+1, I was just thinking the same thing.

aquaanox · 08-23-2007, 11:24 PM

Quote:

Originally Posted by Walked U

i understand what your saying.

Most aftermarket exhaust come either in a 1 peice or 3 inividual section exhaust.

all of them are bolt ons which bolt from the primary cat back.

Only time where youll have to cut anything off is when you only buy section 3, which is the muffler / tip part.

Im sure even if you get your exhaust custom made it can be a true bolt on.

Mine was made with 3 sections all connected by v clamps.

So if an exhaust comes with the mid pipe (section 2) and the rear muffler (section 3), then there is no cutting required ? im getting conflicting answers from people.

Green-Eggs · 08-24-2007, 12:13 AM

You would need section 1=front pipe, 2=mid-pipe plus rear mufflers for there to be no cutting

The lower pipe is the front pipe and the upper pipe is the mid pipe from RD Sport

Rear Muffler options of quad or race

aquaanox · 08-24-2007, 12:23 AM

thanks, so on the stock system section 1 and 2 are a single piece or welded together already, thus req cutting with a full replacement system.

Gen_E92 · 08-24-2007, 02:39 AM

Sam,

Why does Eisenmann use massive canisters and RD race use tiny ones? I'm leaning towards the race version just waiting for better sound clips

Noize · 08-24-2007, 02:48 AM

I need to ride in a 335i with an exhaust to see if I can deal with it day in and day out.

HyperM3 · 08-24-2007, 01:18 PM

From what I understand, the OEM exhaust is ONE PIECE from tip to downpipe. Therefore, any exhaust that is "cat back" will not be technically bolt-on because you need to cut the stock exhaust.

That being said, even though you cut the stock exhaust, you can just bolt that back on if you need to instead of welding.

08-18-2007, 03:16 PM	#1
fedinand Major 77 Rep 1,271 Posts Drives: '11 X3, '11 GTI Join Date: May 2007 Location: MN iTrader: (6)	Which of the existing cat-back is a true bolt on Which of the current cat-backs don't involve cutting the exhaust? I think CP-E is a true bolt on any of the others?
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08-18-2007, 03:18 PM	#2
Spool ****** 591 Rep 6,169 Posts Drives: A few Join Date: Apr 2007 Location: DC Metro iTrader: (24)	What? __________________ MKIV 6spd 1000hp Club
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08-18-2007, 03:26 PM	#3
fedinand Major 77 Rep 1,271 Posts Drives: '11 X3, '11 GTI Join Date: May 2007 Location: MN iTrader: (6)	Which of the cat-backs available can you just mount up to your car w/out hacking up/cutting the factory exhaust to make it fit. (I tried to edit the title, but couldn't change it).
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08-18-2007, 03:33 PM	#4
sdwilly First Lieutenant 23 Rep 384 Posts Drives: M4 Join Date: Apr 2007 Location: Bay Area iTrader: (1)	From how I understand it, any exhaust that removes the 2nd Cat would be a "true" bolt on.
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08-18-2007, 03:37 PM	#5
Spool ****** 591 Rep 6,169 Posts Drives: A few Join Date: Apr 2007 Location: DC Metro iTrader: (24)	I haven't heard of any mass produced catback exhaust that requires cutting or hacking at it to make it fit. It bolts on. __________________ MKIV 6spd 1000hp Club
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08-18-2007, 03:49 PM	#6
fedinand Major 77 Rep 1,271 Posts Drives: '11 X3, '11 GTI Join Date: May 2007 Location: MN iTrader: (6)	No, not cutting the aftermarket cat-back - cutting the existing 335 exhaust off...then putting on the aftermarket exhaust. Most exhausts that I have had allowed me to simply unbolt the stock cat-back and then bolt on the aftermarket cat-back. Most of the pics I have seen of aftermarket cat-backs here don't have a flange that would bolt up to the remaining stock exhaust. (I'm must be having a hard time expalianing myself).
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08-18-2007, 03:56 PM	#8
Walked U Brigadier General 186 Rep 3,125 Posts Drives: Too many to list Join Date: Nov 2006 Location: USA iTrader: (5)	i understand what your saying. Most aftermarket exhaust come either in a 1 peice or 3 inividual section exhaust. all of them are bolt ons which bolt from the primary cat back. Only time where youll have to cut anything off is when you only buy section 3, which is the muffler / tip part. Im sure even if you get your exhaust custom made it can be a true bolt on. Mine was made with 3 sections all connected by v clamps. __________________ Previous - E90 335i, E82 135i, E89 Z4 3.5SI, Range Rover S/C, Ultra White RCF, Maserati Granturismo Current Lexus: SMG LC500 performance package Porsche:1973 911E Ferrari 575 SA, 458 Italia
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08-18-2007, 03:58 PM	#9
Driver72 Brigadier General 351 Rep 4,484 Posts Drives: 335i - to new owners now. Join Date: Dec 2006 Location: California iTrader: (0)	I believe almost all of them eliminate the 2nd Cat. Borla is one of the few that don't eliminate the 2nd Cat.
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08-18-2007, 04:02 PM	#10
fedinand Major 77 Rep 1,271 Posts Drives: '11 X3, '11 GTI Join Date: May 2007 Location: MN iTrader: (6)	Thanks for the answers.
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08-18-2007, 04:03 PM	#11
JWadle Since '75: 530i/733i/745Turbo/M5/M6/325iX/540i 7 Rep 191 Posts Drives: '07 335xi 6MT Sp Grph Join Date: Mar 2007 Location: Boulder, Colorado iTrader: (3)	SuperSprint I have been told by SuperSprint that their catback - including mufflers, X-pipe and S-pipe (eliminating secondary cats) - is a direct bolt on. __________________ '07 E90 335xi 6MT Sparkling Graphite Options: Premium~Sport~iDrive~Nav~HD Radio~iPod 6FL~Comfort Access~Rear Sunshade Mods: Short Shift Knob~M-Tech Wheel~CF Interior~BBS RGRs~Passport HW~Blacklines~Rear Fogs~Shadowline Trim~Euro Xenons~Lux 4~M-Tech Front & Sides~Blackout Grille~Rear Power Outlets~Berber Mats
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08-18-2007, 04:08 PM	#12
1clean335i Perf BMW mag issue 147, 159 432 Rep 6,799 Posts Drives: Project Estoril Join Date: Feb 2007 Location: Miami, FL iTrader: (31) Garage List 2013 335i M-sport [0.00] 2011 X5 xdrive35i M ... [0.00] 2009 335i M-sport [0.00] 07' 335i Sedan [0.00]	Borla, Ultimate Racing __________________ '13 Estoril Blue 335i M-sport *Don't PM me!* Message me here- http://www.facebook.com/ProjectEstoril
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08-18-2007, 07:52 PM	#14
Green-Eggs Lieutenant Colonel 1454 Rep 1,615 Posts Drives: BMW Join Date: Jul 2007 Location: Los Angeles iTrader: (3)	RD Sport offers a cat back with either Quad tips or Twin tips Let me know if you have any questions
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08-18-2007, 07:54 PM	#15
wj4 Major General 356 Rep 7,719 Posts Drives: E90 manual 335i Join Date: Nov 2006 Location: Burbank, CA iTrader: (8)	How loud is the RD catback with the dual set up? Looks loud
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08-24-2007, 12:13 AM	#18
Green-Eggs Lieutenant Colonel 1454 Rep 1,615 Posts Drives: BMW Join Date: Jul 2007 Location: Los Angeles iTrader: (3)	You would need section 1=front pipe, 2=mid-pipe plus rear mufflers for there to be no cutting The lower pipe is the front pipe and the upper pipe is the mid pipe from RD Sport Rear Muffler options of quad or race
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08-24-2007, 12:23 AM	#19
aquaanox First Lieutenant 28 Rep 307 Posts Drives: e92 328, e90 335 Join Date: Jun 2007 Location: rockville md iTrader: (6)	thanks, so on the stock system section 1 and 2 are a single piece or welded together already, thus req cutting with a full replacement system.
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08-24-2007, 02:39 AM	#20
Gen_E92 Brigadier General 120 Rep 3,430 Posts Drives: slow Join Date: Oct 2006 Location: Vancouver iTrader: (17) Garage List 2007 335i [7.80]	Sam, Why does Eisenmann use massive canisters and RD race use tiny ones? I'm leaning towards the race version just waiting for better sound clips
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08-24-2007, 02:48 AM	#21
Noize Under the radar 42 Rep 840 Posts Drives: FWD in reverse Join Date: Jan 2007 Location: In traffic at idle iTrader: (1)	I need to ride in a 335i with an exhaust to see if I can deal with it day in and day out.
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08-24-2007, 01:18 PM	#22
HyperM3 Too many Alex's, from now on, call me Beaufort 355 Rep 6,188 Posts Drives: See Sig Join Date: Feb 2007 Location: Lawrenceville, NJ iTrader: (8)	From what I understand, the OEM exhaust is ONE PIECE from tip to downpipe. Therefore, any exhaust that is "cat back" will not be technically bolt-on because you need to cut the stock exhaust. That being said, even though you cut the stock exhaust, you can just bolt that back on if you need to instead of welding. __________________ 13 HD FatBob 17 A4 Glacier/Black 1st Edition/Pre+/Sport/EurocodeTMD/Racechip 16 S6 (gone),14 S6 (gone),14 S6 (gone),13 S6 (gone),10 S4 (gone) 07 335i(gone)
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