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All sets of 12 now 10% off regular price!
Red Line 75W140 is a full synthetic high-performance gear oil that is an excellent substitute for expensive factory fluid and an upgrade over off-the-shelf economy fluid. Red Line thoroughly evaluates the manufacturer's recommendations and only makes a fluid recommendation if their own product meets or exceeds the original specification. In many cases the Red Line synthetic will outperform the factory supplied fluids. We've been using Red Line Oil in our BMWs since we opened in 1994 and it remains our best selling BMW differential fluid. 75/140 is a specialized weight used for BMW M3, M5, and M6 models with the M Variable limited slip diff (all M models since 2001). Red Line fluid is used in nearly all E46 M3, E92 M3, E60 M5 we service as well as the custom differentials that we sell. It's great for the street where the polyol-ester base has natural lubricity and friction modifiers lead to smoother and quieter operation with lower operating temps than the factory fluid. We also use it in the track cars we build and prep. It may also be used in other specialized situations where a regular 75/90 will be too thin at elevated temperatures and your diff builder has approved a heavier weight oil.
Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E, and SAE J2360. An alternative to the very expensive factory BMW SAF-XJ+FM diff fluid (#83222282583).
Engineered with an exclusive full-synthetic ester formula, these top-tier products are meticulously crafted to cater to various vehicles, including passenger cars, light trucks, performance vehicles, and marine applications. Offering an unparalleled level of quality, they boast an extensive range of viscosity options, ensuring the highest standards in the current market.
| Location | Fill Quantity (quarts) |
| 5-speed manual transmission (Red Line D4 ATF) | 1.1 to 1.3 |
| Transfer Case (RedLine D4 ATF) | 0.16 |
| Front Differential (Red Line 75/90) | 0.74 |
| Rear Differential (Red Line 75/90) | 1.06 |
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
One of the most common issues with the E46 is that the subframe likes to tear away from the chassis. Fix this by welding in a Rear Subframe reinforcement kit.
Fits the following BMWs:
1998 - 2006 E46 320i 323i 325i 325xi 328i 330i 323ci 325ci 330ci M3
Engine Oil (10w-60) - 1 Quart - Case Of 12 is a premium choice for performance enthusiasts, particularly popular for newer BMW M-cars such as the E46 M3 and E60 M5. This fully-synthetic ester formula is engineered for passenger cars, light trucks, and performance vehicles, providing exceptional wear protection and friction reduction across a wide range of operating conditions. With its high detergency, this engine oil allows for extended drain intervals while maintaining cleanliness.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
When you push your powerplant, thermodynamics push right back. The toll of high performance is higher heat load – and many stock components begin to complain. But Active Autowerke has you covered - this upgraded fan clutch increases viscous coupling of cooling fan blade speed to water pump speed, yielding increased airflow through the radiator for more efficient cooling. A simple, yet wonderful, thing.
This product fits the following BMWs:
1992-1999 E36 323i 325i 328i 330i M3
1998-2006 E46 323i 325i 328i 330i M3
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
Since getting their start in 1981, Active Autowerke has earned a well-respected reputation in the BMW community for engineering high-quality power solutions for popular BMW models. This supercharger kit will produce 525 horsepower and 335 ft.lbs. of torque on your BMW, while retaining platform integrity and daily driveability. Unique to the design of the Rotrex supercharger is the traction drive system, which eliminates the lag often found in other centrifugal supercharger setups. Power delivery is smooth and dependable, and 100% reversible to stock if you so choose, since each system is designed as a self-contained unit.
Kit features:
Performance Specs:
This product was last offered at the strikethrough price on
06-15-2026
This product was last offered at the strikethrough price on
06-16-2026
All sets of 12 now 10% off regular price!
Synthetic D4 ATF is suitable for use where Dexron III, Dexron II, or Mercon fluids are recommended. ATF D4 is similar to Red Line's MTL formula and can be used in many BMW manual transmissions where MTF or MTF-LT2 is called for. The D4 ATF provides significantly improved gear protection than most OEM oils. The balanced frictional characteristics provides smooth and consistent shifts for extended drain intervals. The superior stability compared to petroleum ATFs allows high-temperature operation without varnishing valves and clutches which leads to transmission failure.
Features:
This product was last offered at the strikethrough price on
03-26-2026
This product was last offered at the strikethrough price on
03-26-2026
When conducting BMW engine rebuilds, the application of assembly lube on wear surfaces is crucial for protection during initial startup. Red Line's proprietary formula offers exceptional safeguarding with 3x greater film strength compared to standard molybdenum disulfide assembly lubricants. Notably, it serves as a superior corrosion inhibitor for long-term storage and avoids filter clogging issues common with some assembly lubes.
All sets of 12 now 10% off regular price
Much like a newborn child, the first few moments of your engine's life are crucial for its long-term well-being. Don't let your hard work go to waste - use Red Line assembly lube to protect engine components during those first vital moments after initial start-up, when no lubrication is present. Red Line's special formula provides 3x more film strength than conventional assembly lubricants, and it works great as a corrosion inhibitor during those long-term engine builds that spend a lot of time in storage. Best of all, it's designed not to clog filters like many assembly lubricants have a tendency to.