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Torque Converters

Choose a performance torque converter from B&M or Hays. We offer a variety RPM stall speeds to fit your needs. B&M and Hays torque converters have you covered for your street, track, or off-road adventures.

Hays Twister Torque Converters

Hays Twister Torque Converter

Hays Twister Full Race Torque Converters

Designed specifically for blown, nitrous, and turbocharged trans-brake applications and strong enough to withstand the punishment of 1000-horsepower engines, they're available in four different stall-speed ranges: 2400-2800, 2800-3200, 3200-3600, and 3600-4200. They're internally welded (not brazed) for longer life and greater consistency and, in select areas, spray-welded. Heavy-duty Torrington bearings and carefully selected stators with high-flow vents and channels promote cooling, a custom-designed anti-balloon plate prevents converter swelling, and each one is inspected during every step of assembly and hand-built.

Hays Twister 3/4 Race Performance Torque Converters

Ideal for street/strip applications. Multiple stall speeds are available to accommodate virtually any combination of engine modifications, including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, and lower gear ratios. Built, tested, and track-proven to support up to 650 horsepower, each Twister torque converter is hand-built and inspected during to ensure top quality. They are offered for GM, Ford, and Chrysler and available in various stall speeds to suit countless applications. State-of-the-art Spray Welding techniques are used in select areas for clean, strong, and consistent fusion, which also builds strength through hardening from higher process temperatures. Each torque converter is internally welded – not brazed – and heavy-duty Torrington bearings are employed for maximum strength and durability. Stators with high-flow vents and channels promote cooling in heat-producing high-horsepower applications.

Why do I need a B&M torque converter?

Higher Stall & Higher Torque

The reason for considering a B&M Torque Converter boils down to performance. Higher stall speed is the key. A higher stall converter allows the vehicle to accelerate better from a dead stop and may provide tire-smoking performance.
B&M offers a wide range of performance torque converters to fit almost every need. All B&M converters are precision engineered, spin balanced and pressure tested. The B&M environmental drivetrain development lab is a key tool used in the development of every converter designed by the engineering staff. Precision engineered, tested and the success at the track provides proof that B&M Torque Converters are the finest you can buy.

Frequently Asked Questions

What should I expect from a performance torque converter?
Strength and durability is an additional benefit if the converter is properly engineered. Furnace brazing is used to strengthen the converter internally for high performance, racing and heavy-duty applications.
What is stall speed?
Stall speed numbers are listed primarily to rate the converter’s performance level. Typically, the number assigned, 2000, 2400, 3000 etc, lets you know what to expect from the converter. If a 2400 is selected, you should be able to flash stall the converter to about 2400 RPM. This should provide anywhere from 500 to 1000 more RPM to launch, or accelerate, the vehicle from a dead stop, as compared to the stock converter in the vehicle. This increase should substantially improve the acceleration capability of the vehicle. Lighter cars, 2800 lbs and under, typically stalls a little lower than the above mentioned numbers, therefore you should choose a converter with a higher stall number for optimum performance.
How does the engine’s camshaft affect the torque converter’s performance?
The camshaft will affect the torque curve of the engine, which will affect the performance of the converter. For example if your 350 CID engine produces 230 lb.ft. of torque at 2400 rpm, a B&M HoleShot 2000 Converter will produce 2000 rpm stall speed. If you install a 268-degree cam into this engine you will raise the torque curve and at 2400 rpm your engine will produce less torque. Thus the 2000 stall converter will only stall at 1800 or less. However with this new cam the engine will make much more power above 3000 rpm. Keep in mind when the torque curve of the engine is raised you will need more stall speed in the converter to allow the vehicle to accelerate at low rpm (below 3000). A good rule of thumb for advertised cam durations up to 248 degrees, a 2000 or 2400 stall converter is a good choice. Advertised cam durations up to 268 degrees, a 2400 or 3000 stall converter is a good choice. Advertised cam durations over 272 degrees, a 3000 to 3600 stall converter is a must.

How to Install a Torque Converter

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