• Custom TIG welded subframe
  • Powdercoated: Black or White, or Gold Zinc Coated
  • Aluminum diff bushings
  • Aluminum front subframe bushing caps
  • Aluminum output flange seal adapters
  • Billet 31 spline Ford 8.8 inner axle stubs
  • Billet outer stubs with ABS rings
  • Axles with lifetime warranty
  • Diff mounting hardware


-Free Shipping in the USA

Like so many of you, we wondered why BMW differential components and service costs are so high. We got tired of paying over $1000 to change a gear ratio or over $3000 to have a proper upgraded limited slip unit installed into a non-M or M3 differential. Even after the numerous diff upgrades, we could not get the 188mm diff to survive a motorsport environment. The M3 diff even breaks axles with hard shifts and launches, has notorious output flange issues and the factory viscous diff basically turns into an open diff during hot track sessions. We just watned a legit setup that we wouldnt have to worry about ever again!


We designed an OEM subframe replacement to accommodate a Ford 8.8 differential from a 06/07 Ford Explorer into the BMW E46 chassis. This was designed by professional engineers with CAD software and models of both the chassis and differential to achieve the perfect fit. The Ford 8.8 is a legendary differential, way ahead of its time. It is lighter than the M3 differential by almost 15 pounds, yet much stronger. It doesn’t have straight cut gears; and as a result it is quiet, unlike the Winters Quick-Change differential. It can take over 1000hp without flinching. A huge selection of gear ratios are readily available for the 8.8, and at costs just a fraction of BMW versions. Rebuild kits cost under $100. Compare this to hundreds for just BMW bearings! Limited Slip Differential center carriers come in at a fraction of the cost without the “BMW Tax” as well. Many are under $500, and there are many choices of type and application. Setting up these differentials is very easy compared to a BMW unit. In a weekend you can build your indestructible dream tire-burner, or buy one from us!


All in all, the Ford 8.8 is stronger, lighter and much more cost effective than the BMW differentials. If you would like us to build you a ready to go Ford 8.8 perfect for your application, shoot us a message!

The steel subframe is laser cut, TIG welded, and matched to factory tolerances. It is proudly designed and manufactured in the USA. Our subframe uses identical mounting points for all suspension and pick-up points as the factory design. We have a custom jig every subframe is built on. You can use any E46 subframe bushings you prefer, as it retians complete OEM fitment. Requires M3 style sway bar. The subframe uses the diff as a stressed member to take advantage of the strength of the large cast aluminum Ford 8.8 case. The subframe includes aluminum diff bushings that slide into any 06/07 Ford Explorer differential.


  • Factory fit
  • OEM suspension/pickup points
  • Uses normal bushings
  • Comes with aluminum differential bushing


To be certain the power makes it to the ground, we created an axle package that is as indestructible as possible. First, we designed a billet steel outer stub to replace the weak M3/330 unit, and even included an ABS trigger wheel which makes it perform like factory. Then, we created axles to match using upgraded CV joints. These axles are guaranteed for life! Also included is a billet inner stub that slides into any 31 spline Ford 8.8 differential.


Machined from proprietary aerospace billet alloy, the axles feature an upgraded 31-spline axle bar and 31-spline billet machined CV joints. The additional splines offer more spline engagement and allow for larger diameter axle bars: Creating unparalleled strength.

In addition to more spline engagement the billet machined 31-spline CV’s provide more travel and increased operating angle than OEM CV joints. They also provide a significant increase in wear characteristics and durability over standard 108mm CV’s commonly found in axle upgrades.


  • ABS Trigger wheel
  • Anti-Wheel Hop Technology
  • Direct Bolt-In Fit and Finish
  • 31 Spline Severe-Duty CV’s
  • 1-Piece Inner and Outer Stubs
  • Aircraft Grade Certified Alloys
  • CNC-Machined
  • Powder Coated Axles for Corrosion Protection
  • Black e-coat finish on inner and outer stubs to protect against harsh conditions without impeding spline engagement


Optional “Outlaw” Axle upgrade: The Outlaw CV maintains a 108mm design but features an upgraded alloy on the billet machined internals. Each CV also receive an isotropic surface finish for a mirror like polish. The surface finishing provides smoother operation for the CV joint which dramatically reduces heat, premature wear and aides in grease migration. In addition, each Outlaw axle uses premium ARP fasteners for the industry’s strongest CV axle bolts.

Please email us with any driveshaft requirements, as we can have a one made for your project by our partners. We understand our big-power customers have many different engine and transmission configurations, so we have each driveshaft custom made.

E46/Ford 8.8 Subframe & Axle Kit

"Outlaw" Axle Upgrade
  • Due to the intended use of high performance products, Seems Legit Garage, LLC. ("SLG”) products and each part thereof, are sold "AS IS” and with all faults. To the fullest extent allowed by law, SLG Racing Products makes NO written, oral, expressed, or implied statement of warranty or guarantee on any product or part sold. SLG will not be liable for any direct, indirect, incidental, consequential, or special damages, including but not limited to, damage, injury, loss of life, loss of property or equipment, loss of profits or revenue, or claims from any individual or entity arising from the use of any SLG product. 

    RACING IS A DANGEROUS ACTIVITY AND PURCHASERS OF SLG PRODUCTS ACKNOWLEDGE THE INHERENT RISKS ASSOCIATED. SLG MAKES NO REPRESENTATIONS THAT ITS PRODUCTS CAN REDUCE OR ELIMINATE ANY SUCH RISK. SLG products are NOT FOR STREET, HIGHWAY, OR AIRCRAFT USE and are intended ONLY for race vehicles operated on closed-course facilities or race tracks with appropriate supervision of qualified technicians or mechanics to ensure that the safety needs of the race driver and others are met. SLG products could be combined with other products or parts which may not be suitable and could adversely affect performance of other race parts or the vehicle. The user shall determine the ultimate suitability and safety of the product for its intended use, and the user assumes all responsibility and risk in connection therewith.