BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Post Reply
 
Thread Tools Search this Thread
      09-11-2020, 05:57 PM   #1
gkgsvensson
Private
gkgsvensson's Avatar
75
Rep
80
Posts

Drives: 2007 Z4 M Coupe
Join Date: Nov 2016
Location: Boston

iTrader: (0)

The Ultimate BimmerWorld Xpipe Solution

Greetings everybody, I would like to share with everyone what I think might be my absolute favorite X pipe setup you can get. I felt I owe it to the community to report these results as I spent countless hours researching this topic in search of the perfect tone. The requirements for my dream xpipe were the following:

- Far forward “X” or crossover for the best exhaust scavenging and high pitched, exotic exhaust tone
- Minimal rasp/drone, but still loud and throaty exhaust note
- High flow cats which do not trigger a CEL, do not degrade over time/crumble up, and minimize any head losses in the exhaust
- Fully bolt on design which fits well within exhaust envelope

Base X pipe choice:
Unfortunately there is no readily available x pipe which could provide these features right off the bat. However, of the far forward x pipes, (BimmerWorld, Gintani, ESS) the BW is the easiest to acquire and has very high dyno proven gains. Thus I decided to start with their resonated, catless version as the “base pipe”. For some reason though, BW doesn’t offer a version with HFC for stock headers, so I realized some modification was required.

HFC Solution:
Having had bad experiences in the past with HFC, I knew I would have to be very careful here. In the past running generic Magnaflow HFC, they would break up and rattle within 2 years, so these were out. Then there are HJS cats, but they were so cost prohibitive I didn’t consider them. Enter GESi cats, which are stainless steel based honeycomb design HFC made in the USA. Not only are they built to last, but they are able to provide 300 cell performance with 200 cell flow rates. I chose their “non EPA” HFC at about 150$ each and put them in the primary location on the xpipe. I am happy to confirm that there is NO CEL, and the smell is virtually non existent. They are also small, so I’m not worried about them scraping the ground. Lastly, an additional advantage to the BW design lets me swap out decat pipes on the primary position quickly and easily, should I ever want to do that.

Rasp Solution:
Even with the addition of HFC, the BW was still too raspy and rough for my liking. I decided to weld in a 12” Vibrant 1792 resonator for each bank in the secondary position. I figured this would eliminate the rasp based on the fact that the stock x pipe has SIX rasp dampeners: 4 cats and two resonators. Thus I knew I had to match the stock x pipe with 6 rasp dampeners of my own if I wanted to get the same “clean tone” the stock pipe had. However, what if it got too quiet with 4 resonators? I am happy to say that is not the case at all!

Sound and Impressions:
My car has a UUC Corsa catback paired to this xpipe, and the sound it makes is simply perfection. Cold start is boomy and smooth, it almost rumbles your chest as it gets to temperature. Cruising around town is loud enough to announce your presence but not obnoxious at all, and the Corsa make a beautiful, sonorific wail when you begin to accelerate. And then there’s the top end...if you have ever been in a Ferrari 355, the screaming S65 sounds like the cross planed cousin of that magnificent cinquevalve V8. And then there is the performance benefit: While I wouldn’t describe it as a massive difference, the car feels much “peppier” and third gear feels much less flat. It’s as if I got a nice dyno tune for the car (so like 20whp gain I would guess)

The only downside to this setup is the cost: Xpipe plus resonators plus HFC all Tig welded and installed cost me nearly 2k. But I feel every penny was well spent, and I plan to make a comprehensive exhaust video to capture the sound. I simply adore this car and it’s motor more than ever now
Attached Images
 
__________________
2001 E39 M5 - Titanium Silver
2007 Z4 M Coupe - Sepang Bronze
2008 E92 M3 - Jerez Black
Appreciate 13
SYT_Shadow11421.00
911r886.50
wyatth3544.00
CTMike262.00
SAMM3Y3085.00
DanMpower3204.00
L4ces337.00
bhowelett125.00
DrFerry6722.50
chief207.00
slcook541859.50
SaNGRia980.00
      09-11-2020, 05:59 PM   #2
b4hand
Captain
661
Rep
966
Posts

Drives: 2011 ZCP M3
Join Date: Jul 2017
Location: Austin, TX

iTrader: (3)

"Ultimate" maybe by your definition, but I love the rasp on the Bimmerworld X-pipe. Would be interested to hear how it sounds
Appreciate 0
      09-11-2020, 06:00 PM   #3
SYT_Shadow
///M Powered for Life
SYT_Shadow's Avatar
11421
Rep
10,296
Posts

Drives: E90M/E92M/M4GTS/M4GT4/X5M
Join Date: Sep 2010
Location: Greenwich, CT

iTrader: (2)

Very, very nice setup. I've steered several friends in a very similar direction, although they've gone with the cheaper BW resonated xpipe + Magnaflow cats in the secondary position.

What you've done is a step up from that. Excellent job.
Appreciate 3
derbo3592.00
L4ces337.00
SaNGRia980.00
      09-11-2020, 06:06 PM   #4
gkgsvensson
Private
gkgsvensson's Avatar
75
Rep
80
Posts

Drives: 2007 Z4 M Coupe
Join Date: Nov 2016
Location: Boston

iTrader: (0)

Quote:
Originally Posted by SYT_Shadow View Post
Very, very nice setup. I've steered several friends in a very similar direction, although they've gone with the cheaper BW resonated xpipe + Magnaflow cats in the secondary position.

What you've done is a step up from that. Excellent job.
Appreciate it hugely shadow! I remember reading your thread about tracking on HFC which led to breaking your engine and being very careful about choosing the right cat. If I ever start to track a lot, I will simply swap out a BW decat primary section and never have to worry about it. I had a magnaflow fail and melt on my E39 M5 which screwed up my S62 badly
__________________
2001 E39 M5 - Titanium Silver
2007 Z4 M Coupe - Sepang Bronze
2008 E92 M3 - Jerez Black
Appreciate 1
SYT_Shadow11421.00
      09-11-2020, 06:35 PM   #5
wyatth
Colonel
3544
Rep
2,822
Posts

Drives: E90 ZCP
Join Date: Dec 2007
Location: Bay Area

iTrader: (0)

Wow, well done!! This is exactly what I wish was available off the shelf. Please report back with updated after you've driven more -- sound changes, scraping, etc.

BW + GESis is exactly what I had in mind. The additional resonators really speak to me as well. I want the power of "Stage 2" but not the volume, rasp, or smell associated with any of the offerings.
Appreciate 1
slcook541859.50
      09-11-2020, 07:02 PM   #6
CTMike
First Lieutenant
United_States
262
Rep
325
Posts

Drives: 2021 X5 40i MSport/2011 E93 M3
Join Date: Jul 2016
Location: CT

iTrader: (1)

I’ve had my E93 about a month and I’ve got a list of things I want to do to it that’s approximately what I paid for it. Lol. Really nice set up!
Appreciate 0
      09-11-2020, 09:46 PM   #7
SYT_Shadow
///M Powered for Life
SYT_Shadow's Avatar
11421
Rep
10,296
Posts

Drives: E90M/E92M/M4GTS/M4GT4/X5M
Join Date: Sep 2010
Location: Greenwich, CT

iTrader: (2)

Quote:
Originally Posted by gkgsvensson View Post
Appreciate it hugely shadow! I remember reading your thread about tracking on HFC which led to breaking your engine and being very careful about choosing the right cat. If I ever start to track a lot, I will simply swap out a BW decat primary section and never have to worry about it. I had a magnaflow fail and melt on my E39 M5 which screwed up my S62 badly
Whenever I talk with James or Phil at BW I always nag them for not building the regular header version with a gesi cat.
They do make this for their longtube headers. I have those headers in my stroker and have both the uncatted and catted xpipes

Losing the engine was sad and had led to an impressive cost over the last few years, but the stroker is quite awesome.

The Bimmerworld xpipe is absolutely the way to go. With these improvements you've made it's a no brainer for me. Great job executing it and posting your results!
Appreciate 0
      09-11-2020, 10:56 PM   #8
kyippee
Lieutenant Colonel
kyippee's Avatar
United_States
1072
Rep
1,617
Posts

Drives: E92 M3, Supra MK5, F44 235GC
Join Date: Feb 2017
Location: SF Bay Area

iTrader: (0)

Can we get a sound video? I'm thinking about trying the Corsa muffler too. I have an Evolve HFC + resonated x-pipe, so I think it should be similar!
Appreciate 0
      09-12-2020, 12:59 PM   #9
derbo
Derbo Tuning
derbo's Avatar
3592
Rep
3,012
Posts

Drives: BMW M3
Join Date: Aug 2017
Location: Bay Area, CA

iTrader: (2)

Quote:
Originally Posted by SYT_Shadow View Post
Whenever I talk with James or Phil at BW I always nag them for not building the regular header version with a gesi cat.
They do make this for their longtube headers. I have those headers in my stroker and have both the uncatted and catted xpipes

Losing the engine was sad and had led to an impressive cost over the last few years, but the stroker is quite awesome.

The Bimmerworld xpipe is absolutely the way to go. With these improvements you've made it's a no brainer for me. Great job executing it and posting your results!
Maybe one day they will make it?
__________________
IG:ruhrohz_m3
Journal: Link
E9x ZCP Suspension Info: Link
Track Chat Discord: https://discord.gg/VsKbTyqBVj
SF Bay Area: DM For coding services
Appreciate 1
SYT_Shadow11421.00
      09-13-2020, 12:19 PM   #10
blastpanel
New Member
blastpanel's Avatar
20
Rep
22
Posts

Drives: 2011 BMW M3 E92
Join Date: Jun 2016
Location: NC

iTrader: (0)

How low do the GESI cats hang– do they tuck in flush? I damaged a cat on my ESS XPipe and am considering this option, but don't want to ruin another one if I get a little wacky on the gators. On that setup, the cats are the lowest point and are pretty vulnerable.
Appreciate 0
      09-13-2020, 03:46 PM   #11
Not Sure
Second Lieutenant
213
Rep
283
Posts

Drives: 2013 E92 M3
Join Date: Jul 2017
Location: Mich

iTrader: (0)

Quote:
Originally Posted by SYT_Shadow View Post
Whenever I talk with James or Phil at BW I always nag them for not building the regular header version with a gesi cat.
group buy? im in.
Appreciate 0
      09-13-2020, 04:01 PM   #12
SYT_Shadow
///M Powered for Life
SYT_Shadow's Avatar
11421
Rep
10,296
Posts

Drives: E90M/E92M/M4GTS/M4GT4/X5M
Join Date: Sep 2010
Location: Greenwich, CT

iTrader: (2)

Quote:
Originally Posted by Not Sure View Post
group buy? im in.
I'll ask again. At least if they can offer it. If it came like this it would be pretty cost effective.

The BW xpipe is the way to go and if you could add cats it would only get better
Appreciate 1
slcook541859.50
      09-13-2020, 04:31 PM   #13
G80indy
Save the Manuals
G80indy's Avatar
United_States
1710
Rep
2,937
Posts

Drives: Z3, E46, G80
Join Date: May 2005
Location: Indy

iTrader: (0)

Corsa even on stock pipes is really great
__________________
2023 G80 6MT, CCBs
2002 330i Dinan, 5MT
2000 Z3 Conforti, 5MT
Appreciate 0
      09-13-2020, 04:55 PM   #14
MikeYQM
Private First Class
MikeYQM's Avatar
Canada
80
Rep
143
Posts

Drives: 2013 BMW M3 ZCP
Join Date: Nov 2019
Location: Moncton NB Canada

iTrader: (0)

Wondering if resonators in primary cat location and HFC downstream of the X would also work?
__________________
2013 Fire Orange II E92 M3 ZCP
Bimmerworld (Quad) Resonated X-Pipe, AFe Stage 2 CF Intake, Carbon Project CF Plenum, Epic Motorsports Race Tune, Rogue Engineering Power Pulleys, Continental Extreme Contact Sport
Appreciate 0
      09-13-2020, 05:00 PM   #15
pbonsalb
Lieutenant General
5178
Rep
10,555
Posts

Drives: 18 F90 M5, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: New England

iTrader: (4)

I bought the magnaflow 10781 X section that Bimmerworld uses and plan to cut up and reweld my no name x pipe to fit it as far forward as possible.
Appreciate 2
SYT_Shadow11421.00
      09-13-2020, 05:51 PM   #16
M43S7RO
Major
501
Rep
1,054
Posts

Drives: Jerez Black E92 M3
Join Date: Sep 2015
Location: Peoria, AZ

iTrader: (13)

The BW race pipe in titanium is what I dream of.
Appreciate 2
SYT_Shadow11421.00
slcook541859.50
      09-13-2020, 06:19 PM   #17
Melbourn3
First Lieutenant
Melbourn3's Avatar
United_States
342
Rep
387
Posts

Drives: E90 M3 ZCP STRIPPER
Join Date: May 2020
Location: Los Angeles

iTrader: (3)

I’m extremely happy with my evolve x pipe, and the rasp is pretty nice IMO. Would love to hear this though.
Appreciate 0
      09-13-2020, 07:25 PM   #18
e90m3808
Private First Class
101
Rep
107
Posts

Drives: 2018 M3
Join Date: Jul 2019
Location: Hawaii

iTrader: (0)

OP- post a video!
Appreciate 0
      09-14-2020, 01:28 AM   #19
GORDON.M3
Colonel
GORDON.M3's Avatar
Canada
1403
Rep
2,989
Posts

Drives: E92 M3 • F25 X3 M-Sport
Join Date: Dec 2013
Location: LAX/YYZ/NRT

iTrader: (11)

Part number on the GESi cat?
__________________
INSTAGRAM: GORDON.M3
DINAN | EVOSPORT | VAC | ARP | RD SPORT | NEEZ | EIBACH | CSF | IND | BILSTEIN | KLASSEN | BREMBO | ENDLESS | BBS | BPM SPORT | PROJECT MU | EVENTURI
Appreciate 0
      09-14-2020, 03:04 AM   #20
MikeYQM
Private First Class
MikeYQM's Avatar
Canada
80
Rep
143
Posts

Drives: 2013 BMW M3 ZCP
Join Date: Nov 2019
Location: Moncton NB Canada

iTrader: (0)

Quote:
Originally Posted by GORDON.M3 View Post
Part number on the GESi cat?
GESi 10025 I believe he is referring to
__________________
2013 Fire Orange II E92 M3 ZCP
Bimmerworld (Quad) Resonated X-Pipe, AFe Stage 2 CF Intake, Carbon Project CF Plenum, Epic Motorsports Race Tune, Rogue Engineering Power Pulleys, Continental Extreme Contact Sport
Appreciate 0
      09-14-2020, 10:50 AM   #21
Richbot
Major General
2738
Rep
5,478
Posts

Drives: Jerez Black E90
Join Date: Sep 2007
Location: STL

iTrader: (5)

This is, except for xpipe location, pretty close to what the AFE xpipe gets you.
__________________
Appreciate 2
Aeg0n0.00
a5m595.00
      09-14-2020, 01:57 PM   #22
DanMpower
Colonel
DanMpower's Avatar
United_States
3204
Rep
2,156
Posts

Drives: BMW M3s and a Red VW
Join Date: Feb 2018
Location: Southern CA

iTrader: (28)

Thanks OP for the inspiration. I'll be making my own custom BimmerWorld X-Pipe solution as well.

Since I'm running a Stage 2 tune, not worried about a CEL so I'll be putting the GESI cats in your "resonated" position behind the X section and I'll be welding in some smaller resonators in the front position for a bit more clearance.

Appreciate 2
SYT_Shadow11421.00
94jedi829.00
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:56 PM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST