Are you looking to improve your driving experience with a reliable and efficient limited-slip differential? The HBD BM4 A is specifically engineered for vehicles with automatic transmissions, offering a perfect blend of performance and comfort. With its low pre-load and progressive lockup mechanism, this differential ensures a smooth and enjoyable ride, whether you're navigating city streets or tackling snowy, icy, or slippery roads.
If you're currently using a viscous coupling or a torque-sensing system, such as helical LSDs, the HBD BM4 A is a significant upgrade. It offers superior performance, especially for those who frequently drive in challenging weather conditions. You'll notice:
The HBD BM4 A is compatible with a range of vehicles equipped with automatic transmissions. Make sure to check your vehicle's specifications to ensure a perfect fit.
Many customers have shared their experiences with the HBD BM4 A, highlighting how it transformed their daily driving. One user noted, "After installing the HBD BM4 A, I instantly felt the difference in traction during wet conditions. The car feels more stable, and I can take corners with confidence. Plus, it’s so quiet – I don’t even notice it’s there!"
Another customer mentioned, "I was hesitant to switch from my factory differential, but this upgrade has made my daily commute so much better. The smoothness and grip are incredible, especially when driving in the city!"
Upgrade your vehicle's performance with the HBD BM4 A and enjoy a driving experience that combines stability, traction, and comfort.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1992-1998 BMW 318i |
318i | 1992-1998 |

Cusco is an independent aftermarket company in Japan specializing in manufacturing high-performance parts such as drivetrain components, suspension, chassis bars, including strut towers, engine parts, roll cages, and more.
They are widely known in the automotive industry and have participated in various race series within and outside Japan.
Today, they have become the go-to brand of aftermarket tuners all around the globe.
Racing BackgroundCusco has created many racing vehicles for different racing disciplines, such as rallying, track racing, autocross, time attack events, and gymkhana.
With a history of producing the best race cars in its class, they have used that knowledge and have translated it to all their products creating the best performing and safest parts out there.
Improves Driving ExperienceCusco's goal is to improve each car's potential to provide the driver with the best experience possible. It helps the car provide better feedback to the driver, which helps the driver create better judgment and confidence to trust their vehicle.
Inhouse Manufacturing ProcessCusco maintains its high-quality standard by doing their parts inhouse. From design to manufacturing, they have created a dedicated facility that would help them ensure that it passes their strict requirements, providing the clients with the best products they deserve. The company is also ISO 9001 certified, meaning all of its processes have passed the standard requirement of the regulatory commission.
Struts and Roll cagesCusco has been very popular when it comes to chassis stiffeners and roll cages. They create one of the best roll cages that comply with the racing body's standards. Their design helps improve chassis stiffness and rigidity, making it handle better and helps protect the driver in case of an accident. It is intended to save dozens of lives on the race track and in the streets.
Purchase Cusco Parts at Vivid RacingCusco has been supplying parts for almost a decade among thousands of enthusiasts worldwide. With its track record of providing parts that outperform the competition, they are a brand that anyone can count on. Visit Vivid Racing and check out the list of Cusco products specific to your needs.