KMP BMW F8X Drexler Differential
Product Description
The KMP Motorsport Bolt-On Differential is a high-performance upgrade designed for motorsport and endurance racing. This complete unit replaces the electronic GHAS differential with a Drexler Limited Slip Differential (LSD) and KMP Motorsport final drive, delivering superior reliability, strength, and performance for high-demand applications.
Mechanical LSD for Endurance Racing
Unlike the servo-operated Active M Differential, the KMP Motorsport Differential features a mechanical plated LSD, offering consistent, predictable performance. With reduced heat generation and enhanced durability, this unit is ideal for continuous, high-endurance racing.
- Racing-Specific Configuration: Ramp angles and preload are precisely tuned for motorsport use.
- Predictable Performance: Provides reliable and consistent grip in all racing conditions.
Optimised Final Drive Ratio (3.91)
The KMP Motorsport Differential utilises an optimised final drive ratio of i=3.91, compared to the stock 3.46 ratio, delivering 13% more wheel torque in all gears. This enhancement improves acceleration and wheel torque, giving drivers a competitive edge on the track.
Advantages Over BMW Motorsport Differentials:
- Replaceable final drive as a wear part for extended service life.
- Longer gear lifespan due to a motorsport-specific tooth profile.
- Serviceable components reduce long-term costs.
Key Features and Benefits of the KMP Motorsport Differential
Replaceable Final Drive
Extend the lifespan of the differential by replacing the final drive instead of the entire unit.
Lightweight Construction
Reduces rotational mass for improved efficiency.
Enhanced Strength
Built with high-quality materials to withstand motorsport demands.
Tailored Ramp Angle and Preload
Configured specifically for racing conditions.
Compatibility and Installation Notes
- Driveshaft Requirements: Requires either two left OEM driveshafts or KMP driveshafts.
- Software Adjustment: The OEM electronic LSD must be disabled in the software prior to installation; assistance is available.
- Material Compatibility: Compatible with steel shafts only; not suitable for carbon driveshafts due to spline differences.
- F87 M2 (Standard): Contact KMP prior to purchase for compatibility verification.
- Oil Requirements: Delivered without oil; recommended use is 75W140 oil (0.9–1.0 litre), such as Motul or Mobil.
Transport, Packaging, and Deposit System
- High-Quality Crate: Shipped in a reusable wooden crate for secure transport.
- Deposit/Exchange Option: KMP offers a deposit system to ensure short lead times. Customers pay a deposit upfront, refundable upon return and inspection of the original differential.
Why Choose the KMP Motorsport Bolt-On Differential?
- Superior durability and performance for high-endurance motorsport.
- Enhanced wheel torque with optimised final drive ratio.
- Serviceable design reduces long-term costs.
- Reliable and consistent performance for racing conditions.
Upgrade Your BMW with KMP Motorsport Precision
The KMP Motorsport Bolt-On Differential offers exceptional reliability, strength, and performance for high-performance BMW models. Tailored for track and endurance racing, this differential redefines drivetrain optimisation.
*Please Note: This is a non returnable part.
Shipping & Delivery
Dispatch Times
Most stocked items dispatch within 1–2 business days. Some products may have longer lead times due to special ordering, availability, or build times. If your order contains multiple items, they may be shipped together once all items are ready unless otherwise agreed.
UK & International Shipping
We ship worldwide. Transit times vary depending on destination and courier. Tracking details are provided once your order is dispatched.
Import Duties & International Orders
International customers are responsible for all import duties, taxes, and clearance fees. These are not included in our prices and are outside of our control. Refusal or non-payment of import charges may result in return shipping, handling fees, and customs charges being deducted from any refund.
Damaged Shipments
If your parcel arrives visibly damaged, please refuse delivery or note the damage with the courier. If damage is discovered after opening, contact us immediately with photos. Do not install damaged items, as installation voids courier claims and return eligibility.
Returns
Returns must be authorised before sending anything back. Returns must be requested within 14 days of delivery and returned within 14 days of approval, in unused/uninstalled condition and in original packaging. Some items, including special-order, built-to-order, used, installed, or modified parts, are non-returnable.
Full details are available in our Shipping Policy and Returns & Refund Policy.
Warranty & Disclaimer
Warranty
Most products include a manufacturer’s warranty covering manufacturing defects only. Warranties do not cover wear and tear, improper installation, misuse or neglect, track use, competition or racing environments, labour costs, vehicle damage, downtime, or consequential loss. Warranty outcomes are determined by the manufacturer, not Clubsport Garage. Items must be returned for inspection at the customer’s cost unless agreed otherwise.
Fitment & Installation
Many products are aftermarket components and may require professional installation or minor adjustment. Perfect OEM-level fitment cannot be guaranteed. Professional installation by an experienced workshop is strongly recommended. Installed or used items cannot be returned.
Motorsport Use Disclaimer
Some products are intended for off-road, track, or motorsport use only and may not be legal for road use, for example non-TÜV/DOT-approved parts. It is the customer’s responsibility to ensure compliance with local laws, insurance requirements, and vehicle regulations. By purchasing and installing aftermarket parts, you accept all responsibility for ensuring compatibility, legal compliance, proper installation, and any resulting wear, damage, or failure.
Product Images & Descriptions
Product photos are illustrative and may differ slightly from the item supplied. If specific details are important, please contact us before purchasing.
Full details are available in our Terms of Service and related policy pages.
