Single piece 6061 construction, optimized cooling, provisions for temp sensor, and external cooler with removable air duct.

Built to last, made from a single piece of 6061 billet aluminum with a rugged and good-looking hard-coat anodizing our diff cover can handle anything you throw at it. Not only is it an absolute masterpiece to look at but the billet diff cover checks all the boxes for features needed. Reinforced mounting ears for strength and stability, never again will you break an ear off your diff cover like the factory units are known to do. Each ear is not only unified with the one-piece billet cover but also feature added material for the highest durability possible. This diff cover is cool, literally, the entire construction was designed with optimized cooling in mind. External fins are strategically placed on the rear face, bottom, and between the mounting ears of the cover, serving as effective heat sinks for optimal heat dissipation. This ensures stable temperatures, promoting longevity for both the fluid and your differential. Additionally, the internal design ensures continuous oiling and lubrication to the ring gear, maintaining its stability and preventing fatigue by controlling heat more effectively. An internal baffle at the cover's corner helps maintain proper pressure and prevents cavitation.

All of the OEM features were retained along with the upgrades. The mounting surface was designed to be compatible with both the OEM gasket or RTV of your choosing, some people don't trust the gaskets and we get it. You can transfer your speed sensor directly to your upgraded billet cover and it even features a provision for the sensor wire mounting. Factory bushing geometry allows you to use any E36 diff busing including rubber, poly, and even solid mounts. The drain and fill plugs on the diff cover are upgraded to -6AN using the provided high-pressure fittings with replaceable o-rings. The drain and fill plugs can now also be used for expanding to an external oil cooler allowing you to further expand the fluid capacity for optimized cooling and service intervals. To keep an eye on things from the driver seat is 1/8 NPT provision for temp sensors, this product from Turner has you covered at every turn.

Why the upgrade?

If you're new to differential covers used in earlier generations like the E30, you'll find significant improvements in the OEM E36 cover. Unlike the E30's single mount design, the E36 features a dual mount design, which was introduced to address common issues such as broken mounts due to worn-out bushings and aggressive driving. This upgrade significantly enhanced durability and reliability.

While the factory E36 differential cover was a significant improvement with its dual mounts compared to the previous generation, there are still some shortcomings that the original cover doesn't address. Most factory differential covers, including those on the E36, are cast from aluminum. However, due to the porous nature of cast aluminum, the mounting ears on these covers cannot withstand the intense shocks typical in motorsport or in vehicles with significantly increased power.

Upgrading to our Reinforced Billet Differential cover gives you the strength you need to push your car to its limits without worrying about snapping a diff mount from clutch kicking or other shocks to the drivetrain. In addition to its enhanced strength, this differential cover includes numerous other upgrades and conveniences. These include improved cooling and lubrication for the ring gear, upgraded fill and drain plugs, and the option to expand an external oil cooler for extreme motorsport usage. Designed to complement both upgraded daily drivers and extensively modified track cars, it also boasts a visually appealing design.

Key Benefits:

Reinforced mounting ears for strength and stability - never again will you break an ear off during an aggressive drive or track event
External fins on the back side, bottom, and mounting ears on the casing for maximum cooling and consistent fluid temps
Removeable air duct to direct air across the cooling fins for even more temperature control
Optimized internal design to keep fluid consistently on the ring gear
Integrated breather to prevent cavitation by venting the appropriate amount of pressure being built up in the diff housing
-6AN ports to incorporate the use of a differential cooler - this increases capacity and lowers temps allowing for extended fluid change intervals
1/8 NPT fitting for the use of a temp sensor to monitor fluid temperature
Design:

Single piece 6061 Billet aluminum construction
T6 Black hard coat anodizing for superior corrosion resistance and aesthetics
Compatible with most differential coolers(-6AN) and temp sensors(1/8 NPT)
Designed to accommodate oversized rear sway bars
Retains OEM mounting features including the use of the OEM gasket
Factory geometry bushing size for use with OEM and aftermarket poly bushings
Removeable air duct for easy access to sensors and drain/fill plug
Retains OEM speed sensor and wire mount location
Product development:

Our Reinforced Billet Diff Cover was designed, engineered, tested, and quality inspected by our Research and Development team at Turner. Nothing but the highest level of precision and quality through leading-edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

Revolutionize your BMW's shifting experience with the Turner Motorsport Double Adjustable Short Shift Kit. Tired of the factory's long throw shifters? Turner's solution offers height and throw adjustability, allowing drivers to rediscover the joy of driving their cars.

Ever wondered about the long shifter? Turner's rally lever extension, available separately, provides a Quick Change option. The lower part of the short shifter is keyed, facilitating seamless transitions between long and short levers. Whether you're a track enthusiast, weekend warrior, or daily driver, Turner's short shifter kit caters to your needs.

Key Benefits:

• Adjustable between conservative short throw to ultra-short throw
• Ultra-crisp shifter feel for quicker, more precise shifts
• Enhanced driving experience

Installation:

• Bearing cup assembly for easy installation inside the vehicle
• "Quick Change" between standard and "Rally Style" upper shift levers

Adjustability:

• Independently adjustable knob height
• 22mm adjustment range for fine-tuning shifter throw and feel

Design Features:

• Lower Shifter Assembly CNC machined from 4140 chromoly steel
• Melonite coated with 304 stainless steel shifter ball and Nylatron® NSM bushings
• Shift levers and shifter bearing cup assembly machined from 6061-T6 aluminum
• Type II anodized for durability and corrosion resistance
• Rally Upper Shift Lever machine grooved for OEM boot compatibility
• Both shift levers offer 22mm of independent height adjustability

Turner Weighted Shift Knob - 6 Speed:

Get ready for an improved shifting experience with the Turner Weighted Shift Knob. Crafted from billet 6061-T6 aluminum and featuring Delrin outer construction, this knob adds weight for faster engagement and an overall enhanced driving feel.

Features:

• Anodized billet aluminum core
• Extremely durable Delrin outer construction
• Weight: 340g (11.99oz)
• 5 Speed Coin design
• Anodized billet shift boot collar with Turner logo engraved

Upgrade your BMW's shifting experience with Turner's precision-engineered short shift kit and weighted shift knob for a complete shifter transformation.