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  #1  
Old 04-10-2021, 09:42 AM
LVP LVP is offline
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Location: Ontario
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Center resonator options

Mine is on its way out. I'll JB weld the seam leaks to buy some time, but need some advice on options.

Details
- It's a 2004 4.4 with the 4.8 exhaust on it. From what I can tell the resonator (and I would assume the cats) are all from a 4.8. The PO put that and the 4.8 trim on it. Part number on the resonator is 1810 7531830-03 (Zeuna Starker 204 8629 018).
- I tow sleds in the winter and my track car in the warmer months, so I need the performance to be maintained or better (no torque drop mid-range).

Options
1. Supersprint
https://www.ecstuning.com/b-superspr...onator/789103/
2. Magnflow
https://www.magnaflow.com/products/1...eel-tru-x-pipe
3. Find a used 4.8 replacement

Anyone have similar installs to either 1 or 2?

Thanks in advance!
__________________
Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 345,000km
- 2008 535i, 265,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E

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  #2  
Old 04-15-2021, 12:48 PM
LVP LVP is offline
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Location: Ontario
Posts: 839
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Bump. Anyone with a 4.4, modified centre resonator (after market, x-pipe, etc) and 4.8 rear mufflers that tows? Insight would be appreciated. Thanks!
__________________
Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 345,000km
- 2008 535i, 265,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E

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  #3  
Old 05-10-2021, 02:41 PM
LVP LVP is offline
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Join Date: Mar 2014
Location: Ontario
Posts: 839
LVP is on a distinguished road
I'm getting a magnflow tru-x pipe installed next week. Stay tuned.
__________________
Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 345,000km
- 2008 535i, 265,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E

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  #4  
Old 05-11-2021, 01:53 AM
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Join Date: May 2020
Location: Washington
Posts: 119
plasstik is on a distinguished road
Tuned in.

(Shouts)... Ma’! Go make me some popcorn.

- gets hit in the head with uncooked popcorn bag!


Sent from my iPhone using Xoutpost.com
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  #5  
Old 05-11-2021, 10:46 AM
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Join Date: Jun 2014
Location: SA, TX
Posts: 5,704
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I want to remove the resonator on my 4.8 but will likely be awhile before it happens. Other projects keep pushing modding the 4.8 back.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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  #6  
Old 05-19-2021, 08:07 PM
LVP LVP is offline
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Got the Tru-X Pipe installed. I like it.

https://youtu.be/1xLKoM-Jbbs

https://youtu.be/GGJt9tESpZI

It goes in for body work this weekend, Tire balance next week and deep detailing a few weeks later.
__________________
Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 345,000km
- 2008 535i, 265,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E

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  #7  
Old 05-21-2021, 03:04 PM
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Join Date: Apr 2009
Location: Ohio
Posts: 1,063
Purplefade is on a distinguished road
Quote:
Originally Posted by LVP View Post
Got the Tru-X Pipe installed. I like it.

https://youtu.be/1xLKoM-Jbbs

https://youtu.be/GGJt9tESpZI

It goes in for body work this weekend, Tire balance next week and deep detailing a few weeks later.



I like that, sounds good


It's on my list of things to do as well, right after I get the "needs to be done" things finished
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  #8  
Old 05-31-2021, 06:17 PM
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Join Date: Sep 2016
Location: USA
Posts: 483
Bdc101 is on a distinguished road
Anyone upgraded a 3.0i with an X-pipe instead of the center resonator?



After putting an intake and a 4.6iS exhaust on my 3.0i, I am left wanting for more noise.
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2003 3.0 5MT
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  #9  
Old 06-01-2021, 10:41 AM
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Join Date: May 2020
Location: Washington
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Maybe do a rear muffler delete?🤷*♂️


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  #10  
Old 07-01-2021, 11:56 AM
LVP LVP is offline
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Location: Ontario
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Update. Low end torque is definitely affected. The transmission will upshift too early. Rev it up past 3K and no issues and it winds out nice. I'm debating doing an adaptation reset so maybe the trans will learn the new lack-of-back-pressure setup. Thoughts? Anyone else reset after the x-pipe install?

Thanks!
__________________
Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 345,000km
- 2008 535i, 265,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E

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