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      05-13-2013, 12:37 PM   #1
Lalit@AUTOcouture
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The DEFIVfab E9X M3 Differential Lockdown Kit, EXCLUSIVELY @ AUTOcouture Motoring

Available in 4130 chromoly steel or 6AL-4V Titanium, all units are TIG welded in a custom jig for exacting tolerances and fitment.

Kits include:
- 2 CNC 6061-T6 billet aluminum front bushing assemblies.

- Rear brace unit, all 4130 braces feature 3D modeled and laser cut center plates and full chromoly construction for maximum strength to weight.

- All 4130 chromoly units are powdercoated wrinkle black as standard finish, other colors/finishes are available at additional costs as per request. $968 + shipping.

- Ti units are available bare with light surface conditioning, each unit is numbered, polishing available at additional costs. $1850 + shipping.

- Braces feature custom polyurethane bushings and mounting hardware for mounting to subframe.

- Roughly a 4 hour install, which will be discounted if installed in house.


The kit's design and function is to eliminate wheel hop, sloppy shift feel and power delivery on modified or hard driven E9X M3's. Chassis predictability and power transfer to the wheels is vastly improved without sacrifice. A "must have" accessory for any supercharged or modified M3.

For anyone local who wants a ride just shoot me a PM! All high quality pictures can be found here.







Don't let this happen to you!

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Last edited by Lalit@AUTOcouture; 05-14-2013 at 09:51 AM.
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      05-13-2013, 04:38 PM   #2
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Awesome to see this product offered by ACM so it can help out as many M3 owners as possible. Guys, this is one of the best mods I have put on my car without a doubt. The difference was night and day. As Lalit said, it is a must have and won't cost you an arm and a leg like most M3 mods!
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      05-14-2013, 09:45 AM   #3
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Looks good.

No links to pricing though!
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      05-14-2013, 09:52 AM   #4
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Quote:
Originally Posted by THE TECH View Post
Looks good.

No links to pricing though!
I see what you did there . Updated with pricing!
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      05-14-2013, 04:33 PM   #5
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Is there a DIY link or guide? Is there welding involved?
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      05-14-2013, 04:43 PM   #6
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there are full instructions provided and no welding required, just slight trimming and enlargement of two existing holes.
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      05-14-2013, 06:16 PM   #7
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Can you elaborate more on the installation(trimming, etc)........4 hours seems like a long time for what's being installed
Has anybody used it on the track or is this geared for more straight line performance? Thanks.
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      05-14-2013, 08:12 PM   #8
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Tim B. The rear two rubber differential bushings need to be pressed out. This takes the majority of the time. Removing the exhaust and heat shields, then re-installing takes the rest.
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      05-14-2013, 08:41 PM   #9
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How loud is the gear whine with the aluminum bushings?
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      05-14-2013, 10:53 PM   #10
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here's a link to the install guide:
http://www.defivfabrication.com/inst...ownInstall.pdf

In the cars that have been equipped thus far, a few noticed a slight whine on deceleration over 50mph, but quieted down within a couple hundred miles of driving as the poly bushings seated completely. Some noticed no noise whatsoever. In the one case that consistently made noise, It was discovered that both carrier bearings inside the diff were damaged, and no noise has been present since the repair.

Tim B., It is designed for use in any environment that one would subject it to. It's sole purpose is to eliminate drivetrain slack and provide more predictable power delivery to the wheels in any situation. The suspension is completely unaffected by the modification altogether.

Last edited by defivfab; 05-14-2013 at 10:58 PM.
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      05-15-2013, 04:35 PM   #11
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Quote:
Originally Posted by defivfab View Post
here's a link to the install guide:
http://www.defivfabrication.com/inst...ownInstall.pdf

In the cars that have been equipped thus far, a few noticed a slight whine on deceleration over 50mph, but quieted down within a couple hundred miles of driving as the poly bushings seated completely. Some noticed no noise whatsoever. In the one case that consistently made noise, It was discovered that both carrier bearings inside the diff were damaged, and no noise has been present since the repair.

Tim B., It is designed for use in any environment that one would subject it to. It's sole purpose is to eliminate drivetrain slack and provide more predictable power delivery to the wheels in any situation. The suspension is completely unaffected by the modification altogether.
Good info, thanks! I'm strongly considering it, still undecided.
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      05-15-2013, 05:30 PM   #12
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Weight of each version?
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      05-15-2013, 09:45 PM   #13
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Quote:
Originally Posted by Bubbles View Post
Weight of each version?
4130 version weighs in about 13lbs, Ti brace weighs 2lbs 8oz.
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      05-16-2013, 08:49 AM   #14
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Quote:
Originally Posted by Tim B. View Post
Good info, thanks! I'm strongly considering it, still undecided.
Do it and don't look back. Easily the best mod I've done to the car!
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      05-17-2013, 03:50 PM   #15
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Quote:
Originally Posted by defivfab View Post
4130 version weighs in about 13lbs, Ti brace weighs 2lbs 8oz.
YOWZA! is TI REALLY that much lighter?
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      05-17-2013, 04:56 PM   #16
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Quote:
Originally Posted by SSRE View Post
YOWZA! is TI REALLY that much lighter?
Yeah, It's a pretty dramatic difference.
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      05-21-2013, 10:18 AM   #17
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All PM's answered. Bump!
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      05-22-2013, 08:59 AM   #18
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this is a nice piece, but that price is ridiculous for what it is. M tax to another level. Prices on these cars really need to start approcahing reality as the e9x gets older and cheaper
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      05-23-2013, 04:55 PM   #19
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Quote:
Originally Posted by s65e90 View Post
this is a nice piece, but that price is ridiculous for what it is. M tax to another level. Prices on these cars really need to start approcahing reality as the e9x gets older and cheaper
Lol. Typically I wouldn't bother responding to that...but...If you were aware of time/material costs and factor in that each one is hand made,one at a time you'd think differently...or maybe not. No automated robots welding or an assembly line. The 4130 unit is an incredibly fair price for what went into and comes from it. I'm sure there will be a junk cheap ebay knock off one day, have at it. This is what it costs to make things in the USA these days. M tax...pfft.
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      05-23-2013, 05:17 PM   #20
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Quote:
Originally Posted by defivfab View Post
Lol. Typically I wouldn't bother responding to that...but...If you were aware of time/material costs and factor in that each one is hand made,one at a time you'd think differently...or maybe not. No automated robots welding or an assembly line. The 4130 unit is an incredibly fair price for what went into and comes from it. I'm sure there will be a junk cheap ebay knock off one day, have at it. This is what it costs to make things in the USA these days. M tax...pfft.
no doubt it's a nice piece, and believe me I am well aware of what goes into material/time/labor. Hence why I commented what I did.. Any event, bump!!
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      05-24-2013, 01:46 PM   #21
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Bump!
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      05-24-2013, 02:30 PM   #22
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I need this! Already had my diff bolts and rear sub-frame replaced once.
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