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Old 05-30-2014, 03:10 PM   #1
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Exclamation MAXIMUM TRACTION AND POWER TO THE GROUND - Guaranteed!

Hello E46Fanatics,

- Are you sick & tired of the "One Wheel Wonder" syndrome?

Just imagine it; You're sitting at the line, waiting for the Green to light up on the tree, you disengage the clutch then bam, big cloud of tire smoke but you're not going anywhere! You're not the first, and most certainly not the last, to experience the One Wheel Wonder syndrome

Or how about when you're going through that tight apex, approaching the exit point, but no matter how hard you accelerate, the competitor who was right up against your rear going into the turn is now leaving you for dust as you exit? He obviously has an Limited Slip Differential (it's never the driver :p)

- If the answer is YES, MFactory Competition Products is the answer to your prayers!

Introducing the MFactory range of Forged Limited Slip Differentials. By precisely controlling the transfer of torque between the left/right wheels, you will gain maximum traction, allowing you to eliminate the "One Wheel Wonder" syndrome during drag racing and power through those tight corners on the circuit with maximum exit speed.

Helical LSD - Model shown is for Honda. I will upload the BMW image asap


Description: Also known as a "Torque-Biasing Differential", the 2nd Generation MFactory Helical LSD is lighter, stronger and more efficient than any other Helical LSD on the market today! Through the use of maintenance-free Gears, this eliminates the need for special fluids & rebuilds associated with plate-type LSDs. Lock-free operation also ensures no adverse affect to steering response
Suitable for: Street Cars, Drag Cars, Occasional Road/Race
Power Rating: 1000whp+ (As proven in the world's fastest Hondas)
Warranty: Lifetime Transferable Warranty (even if raced!)
Why MFactory?: Our Helical LSD's have been proven to be Stronger, Lighter and have better tolerances than our competition

Feel the Torque***8482; Guarantee: An industry first! We stand by the quality of our products so much and, fully believe that you, our valued customer, will be fully satisfied with your Helical LSD that if, for whatever reason, you are not happy with your purchase, you may return the product to us for a full refund (excluding shipping costs) within 30 days of the purchase date!

Fitments: (Please contact us with your exact Model/Fitment)
BMW E46 with <= 3.07 ratio final drive
BMW E46 with >= 3.15 ratio final drive

Price: All fitments $999.95 inc FREE Shipping within North America/Europe/Asia-Pacific
August Special: For this month only, price is now $799.96. That's a 20% Saving!

Want us to rebuild your core for you so that it's ready to install?: Simply ship your pumpkin to us and we'll handle the rest:

- Prior to assembly, all parts are cleaned, inspected, and polished in a deburring machine with ceramic media
- Preload, gear clearance and torque will all be inspected and adjusted for superior performance
- Housings are media blasted to give a 'better than new' look
- Simply add $400 to the above price

Already have an LSD? Or even one that failed on you and is now just an expensive paper-weight?:

Depending on the type/brand, you may be eligible for the MFactory Refugee Program, a unique service which allows you to trade-in your old/damaged product for a brand-new MFactory equivalent at significant discount. Now you no longer need to have those expensive paper-weights taking up precious storage space! For more details, please CLICK HERE

For further information, please CLICK HERE to Contact Us, or send us a PM

About MFactory
Established in 2004, MFactory Competition Products has since grown to become one of the Leading Global Manufacturers of high performance off-the-shelf aftermarket transmission components, with our large range of Forged Final Drive Gears, LSD's and Close Ratio Gears offering enthusiasts undeniably THE most cost-effective method of performance improvement, far surpassing that of conventional engine tuning.

Being a specialist in this industry requires focused knowledge that can only be gained through years of first-hand testing and tuning experience. Challenging the old adage that 'there is no replacement for displacement', MFactory Competition Products have become a prominent figure in the highest levels of Motorsport, with class-leading recognition the world over in Circuit Racing, Drag Racing and Rally.

Every product within the MFactory catalog is designed in-house in the USA and manufactured in-house to our own specifications at both our US R&D Facility and our multi-million dollar, state-of-the-art, ISO Regulated Taiwan factory, before being tested & developed in the real-world on state-of-the-art race vehicles from North America, Europe and Asia-Pacific. Our products are designed from the beginning to surpass the competition. Why choose MFactory? Here's why:

Official OEM to Honda of America's Motorsports Divisions
World's Largest Manufacturer of Forged Performance Transmission Components for Japanese and European Automobiles
North America's Largest Manufacturer of Limited Slip Differentials for Japanese and European Automobiles
North America's Largest Honda/Acura Performance Transmission Specialist
The World's Only Performance Transmission Manufacturer to offer a 30 Day Money Back Guarantee!
The World's Only Performance Transmission Manufacturer to offer a Discounted Trade-in for a Competitors Product; even if it's damaged!

Want more Information? To view our complete company profile and manufacturing processes, please CLICK HERE to visit our website

Some Customer Reviews
Quote:
Originally Posted by huber
Hi guys, thought I'd post a quick review of the MFactory LSD on my E92 335i. I had this (and a few other goodies) fitted by Advan Performance not long ago.. I can't speak highly enough of Advan Performance and BMR Autowerkes - they've been my one stop shop for mods.

It's been pissing down rain recently in Sydney, so I haven't tested the LSD in anger (nor with DSC/DTC off - will try this some time in future). In the wet, the difference is night and day with the LSD. The traction control lights used to go bezerk even during light throttle, but with the LSD fitted, the car grips and accelerates far better in the wet, and requires much more throttle for traction control to kick in. Definitely much better grip, acceleration and predictability when accelerating in the wet.

In the dry the difference is especially noticeable coming hard out of tight corners. The traction control won't react fast enough to catch the car before it slides out slightly, so beware of this. In a straight line (in the dry) the traction control definitely kicks in less with aggressive driving, but with the power the car puts down, its impossible to avoid wheel spin if you mash the accelerator (JB4/downpipes) - need to learn to gradually apply throttle to the point just before loss of traction. Hard to feel whether acceleration off the line has improved much, but I'd imagine so.

The MFactory LSD is very quiet, except there is some slight delayed backlash(?) noise when I come off the throttle after accelerating hard. I'll get this checked out when I get the car serviced in the next month or so (and diff oil changed out), but even if this noise is normal, I could easily live with it.

Was it worth the money? Probably, for the sake of occasional spirited driving and driving in the wet.. but I'd imagine most of the benefits would be seen on a track.
Quote:
Originally Posted by Obi Wong Kenobi
Let me first say that I was a little skeptical of putting anything except an OS Giken, ATS/Carbonetic or Quaife in my 135i. I've had experience with all 3 brands, plus Kazz in my past cars and the LSD is a huge part of how the car feels navigating corners on the track and the twisties.

Enter MFactory with their excellent customer service and very fairly priced product:

http://www.1addicts.com/forums/showthread.php?t=943830

While surfing the forums and killing some time while at work, I started to read up on their thread. I can't lie, the price was the first thing that attracted me. For under a grand, I could get a forged helical LSD unit that would suit the needs of what I had planned for my 135i. A low noise, stealthy daily driver that was fun to drive. What really appealed to me was they had built pumpkins with a 3.46 final drive and LSD in stock for under $2000 shipped (if you send back your core). At that price, I bit the bullet and eagerly awaited my new purchase.

During the time, I was installing M3 arms front and back along with the BMW Performance suspension. Already installed is a Cobb V3 and downpipes. Even with those mods, I was having serious traction issues in first and second gear. Before getting any more performance mods, a LSD needed to be addressed.

Once all of it was done, the 135i honestly feels like a completely different car. Two years ago, I had a chance to drive the 1M and my 135i is coming close to what that car felt like. The MFactory LSD and suspension really transformed the vehicle. I've had about 4 full days of driving it with the LSD and I'm very impressed. Obviously, since the diff was already installed, I didn't get to see the quality of the item first hand. But knowing it's a forged unit and now my traction issues has been addressed, I'm a happy camper! I can now put the power down and more importantly, hang the tail out on command. That's something I never had a chance to do as well with my Cayman S or E46 M3 since low end torque was lacking. Not to say you couldn't do it at higher speeds... but that's a little more reckless around the city!

I'm sorry for the long winded review, but for my needs and as my daily street car, this MFactory unit is spectacular. I plan to try to squeeze in an autocross or two before the winter and visit some tracks next year and I'm confident this will help. If you're looking for a quality unit without breaking the bank, I believe MFactory should be high on your list of considerations.
Quote:
Originally Posted by snaimpally
Got my 3.46 M/T LSD installed and wow, what a difference! I like to take corners fairly sharply and I used to feel traction breaking and the tires scrambling to get traction. Not any longer, however. The car now corners like it is on rails. Full review to follow but if you have rear wheel drive and a JB4, you are not getting all your power down. An LSD is a MUST HAVE for rear wheel drive cars with the kind of horsepower our cars have. The Mfactory LSD is very quiet (I had read some people complaining about noises from their LSDs) and works very well. The car feels absolutely glued to the ground, especially when going around corners. If you check prices, you will find that Mfactory's current pricing is a heck of a deal, particularly for the 3.46 M/T LSD for welded transmissions.
Quote:
Originally Posted by blown07
Finished the install today and went for a drive. Diving normally the car is as quiet as it was before and no vibration at higher speed so I was happy about that. The rear feels more heavy/planted in the back end going over uneven roads which surprised me....less "tail wagging". Well yes there is definetely more traction. I drove the whole time with DTC off and on a couple of the "greasy" roads where it would normally spin all through second did DSC intervene. I need to up my boost limit in second from 12psi and try again on some good roads. I tried a few mild first gear launches and seemed way better but still some controlled spinning. I did notice the small clunk from the diff when sitting still with brakes on and going from reverse to drive. From drive to neutral and back to drive there is no noise.....need to go and make sure the axle bolts are still tight ...cheers.
Quote:
Originally Posted by najin23
Same here. Just a bit of clunk from stand still to the first gear. Other than that this is one of the best mod i d ever done with a great price. No tale waggle on wot and hard first gear turn with a great control under slipping....u simly will grin after grin from the fact that this car has unlimited potential. With my new inline along with this lsd, i am back again. Kw is next.
Quote:
Originally Posted by jyamona
So it took me awhile to finally write this review up, but I do have a solid amount of miles on the LSD and lockdown kit at this point which is a good thing.

I ordered the LSD through Steven @MFactory. We corresponded mostly through email, and he was always very responsive...even when traveling out of country. I did their core exchange program, and picked up a 3.46 LSD for my 6MT car, as I heard nothing but good things about the final drive change.

After they received my payment, they began reconditioning a large housing bolted pumpkin they had there and prepping it for the LSD. Once the oil seals arrived, it only took them a day to have it prepped and ready. One of the pics attached below so it in its prepped state. Shipping was fast as well, and it was at my door a few days later. It was super clean, and the pumpkin was freshly coated black I had Rick@Defiv fit me in his busy schedule for an install, and decided to get the lockdown kit done at the same time.

Rick and I had the whole diff swap + lockdown install process done in about 4hrs, including pizza and drink breaks. Not bad at all. We took it out on the road for a quick spin to verify everything was solid, then I was on my way. Thanks again Rick!

I've been driving on it for about 800 miles now over the past month or so, and I love how it has transformed the car. The LSD still adds forward thrust to the car even while spinning in 1st and 2nd. Previously, my car would get very unpredictable, and start to kick out the rear in either direction. Now it is planted and firm, just pushing you forward. Traction is greatly improved. It's also great to be able to rotate the car easily with the gas pedal going around turns and you can literally "feel" the LSD working. The 3.46 final drive + my worn tires aren't doing me any favors currently, but I will be switching to some r-comp semi slicks very soon, and going wider.

Running the Cobb Stg 2+ basemap at the strip w/ the LSD and lockdown kit, I was running consistent 12.6 @ 113-114mph all night. I couldn't get lower than a 2.0 60', but that is my tires fault. IAT's per my logs were very high too (105*+), since it was a warm night and. I fully expect to hit 12.1 - 12.2 simply with better tires. Then a PTF pro-tune to get me into the 11's on stock turbo, 6mt, 93oct.

I highly recommend that anyone making power get an LSD. You don't really know what you're missing out on until you experience it. mFactory was great to deal with and their product performs extremely well. Same goes for the defiv lockdown kit. Together, it's a killer combo.
Quote:
Originally Posted by TT-Tom
I know a lot of people have been looking for, candid, feedback on these differentials, so here you go.
I have a 2008 135i with a bolted diff for reference.
The install was actually EXTREMELY easy, backlash on the new diff vs old was actually almost exactly the same. No trimming of the housing was required and the bearing races came right off the old and onto the new with ease.
The pumpkin came without completely pulling the driveshaft, just dropped the axels and loosened the drive-shaft nut, out it came no problem. I also installed the purple powerflex bushings at the same time, this took longer than the entire diff install as my oem ones were pretty stuck in there and you can't use heat on the thin parts of the subframe. After awhile they came out with a small press setup.
With the car back together I took it around the block a few times and can happily report no clunking going from reverse to drive, no whine, and a lot less drivetrain slop with the bushings. Traction wise in a straight line is hard to tell because i need some new rubber soon but the burnout test says that both wheels are turning Cornering now feels like I can use the skinny pedal to turn the car instead of it pushing the front until massive oversteer happens. I only have a few miles on it but I wanted to sing praise for a great, perfectly priced, high quality product. If anyone is going to put something through its paces it will be me I will be going to the track soon and will report back with long term results.
Quote:
Originally Posted by paraklas
I would like to start this review by declaring that I have no affiliation with any of the mentioned companies.

I have been researching for an economical solution to add an LSD (Limited Slip Differential) on my car; E46 320CI with s/s. My requirements would be a plug and play solution without case modifications (thus eliminating clutch-based units) at a reasonable price tag. Car being 13 years old, I did not want to spend a large amount of money. The popular options that I found was the Quaife (established brand, widely used) and Wavetrac (newer brand in the BMW E46 field, higher tech, unique features), with similar price tags; (750 GBP and 1200 USD respectively).

Relatively recently, I stumbled across the LSD unit from Mfactory. I went on their website and checked in their wide model based if there is a unit suitable for my application/vehicle (mine is 3.38 final drive ratio, 188K case). I was a bit skeptical at first due to the fact that the LSD is manufactured in Taiwan (vs UK / USA for the other 2), but after reading a lot of reviews from both BMW and JDM world, I decided to proceed purchasing it. The cost was lower than the competition as well which is a big plus and also the lifetime transferable warranty.

We took the car for a (very spirited) test drive and what a difference!!! Specially in the corners, the power delivery is quite different and you can really feel the car pushing hard throughout the corner. There was no ASC intervention throughout the test drive (it was enabled) and there were no issues i.e. odd noises upon acceleration/deceleration.
Overall I am very pleased with this purchase, highly recommended to anyone considering an LSD unit. I commute around 600miles / week, so I will provide in short time a 2000 mile review.

For some reason I take the long way home instead of the short .
The diff is still super quiet, no leaks/noises. There is no increase on the case temperature after LSD install so I will skip the Z4 finned cover for now.
If you have any questions, please don't hesitate to ask
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Last edited by MFactory; 09-04-2014 at 03:34 AM. Reason: Auto-save 1403715802
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Old 06-03-2014, 11:56 AM   #2
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Lists updated
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Old 06-03-2014, 03:15 PM   #3
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If you combine 10 orders does the group buy price go down?

I'm hesitant and I would like some links to positive reviews and install pages. Thanks!

Sent from BimmerApp mobile app
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Old 06-03-2014, 03:24 PM   #4
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No, the maximum discount is the 20% and includes free shipping.

For links, I don't think I'm allowed to post links to other forums, but you can do a search on the E92, BimmerBoost, N54, Z4 forums which have user feedback on our Helical LSD.
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Old 06-05-2014, 04:12 PM   #5
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Only need 1 more for the >= 3.15 Fitment
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Old 06-11-2014, 06:55 PM   #6
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2.93 is the same fitment as 3.07, correct?

Car is a 330i 5 spd.
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Old 06-12-2014, 08:23 AM   #7
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Quote:
Originally Posted by lolapexseals View Post
2.93 is the same fitment as 3.07, correct?

Car is a 330i 5 spd.
Yup
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Old 06-20-2014, 10:35 AM   #8
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I have a Z4 3.0i - Can I please participate? No idea which diff I have?!
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Old 06-20-2014, 11:24 AM   #9
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Quote:
Originally Posted by pharmed View Post
I have a Z4 3.0i - Can I please participate? No idea which diff I have?!
PM'd
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Old 06-23-2014, 12:16 PM   #10
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Is this free shipping to Canada?
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Old 06-23-2014, 01:26 PM   #11
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Yup
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Old 06-23-2014, 10:22 PM   #12
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Yup
I've sent you a PM, Stephen. Please reply with your email so we can get faster responses from there. Thanks.
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Old 07-23-2014, 04:56 AM   #13
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Some images of a recent rebuild:

Before:


Cleaned in our Ceramic Tumbler:


LSD Installed:


Finished Pumpkin:
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Old 07-23-2014, 08:55 AM   #14
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That's amazing rebuild quality!
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Old 08-02-2014, 03:43 AM   #15
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August Special: For this month only, price is now $799.96. That's a 20% Saving!

No group-buy required
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Old 08-11-2014, 01:17 AM   #16
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I don't understand why it wouldn't but I feel like I have to ask anyways, would the 3.15 fit into my 2.93?
I've got a 2.8 328i manual.
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Old 08-11-2014, 09:47 AM   #17
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I don't understand why it wouldn't but I feel like I have to ask anyways, would the 3.15 fit into my 2.93?
I've got a 2.8 328i manual.
You need a different LSD unit to fit 2.93 final drive. I believe MFactory does have that unit and Stehpen should be able to take care of you.
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Old 08-11-2014, 02:10 PM   #18
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The 2.93 ratio requires a different LSD fitment from the 3.15. We have both fitments in stock though
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Old 08-11-2014, 02:41 PM   #19
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Novice question but why exactly would you need different fitments for the different final drive ratios?

Wouldn't you essentially be taking out the old diff with the old gear ratio and replacing it with the new one anyways?

It seems like having different fitments for different versions of the same car is very expensive and not very efficient.
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Old 08-11-2014, 02:46 PM   #20
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BMW changed the design of the oem differential between the different ratios

i.e < 3.07 has one fitment, > 3.15 has another fitment

This isn't our design, but BMW's
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