8L90 9.5″ 245MM Billet Triple Disc Torque Converter 2500-4500 Stall





8L90 9.5″ 245MM Billet Triple Disc Torque Converter 2500-4500 Stall

As the innovators of the spragless converter, Transmission Specialties is renowned worldwide for the highest quality racing torque converters. As the innovators for the industry, we know what works and what doesn’t. There are no smoke and mirrors here, just the highest quality racing converters built from the best materials money can buy. TSI is the world’s largest supplier of racing torque converters components. Nearly every other converter company in the world uses our components in their builds. We are happy to present one of our most popular converters we sell.

The TSI 9.5” Billet 245MM Torque Converter is the perfect converter for the street car or racer with 300-1400HP. This converter is known in the industry as many names such as 9”, 9.5” 245MM and 10”. Don’t get confused, they are all the same, just different ways of advertising the same product. Only the highest quality billet front covers, furnace brazed pumps and turbines are used in our converters. Our stator designs are revolutionary and will give you lightning-fast launches while still coupling hard on the top end. Most users typically run 2800-3600 stall for street applications. The higher the stall, the more slippage on the bottom end. This will result in additional throttle for light to mid throttle acceleration and increased heat. Due to this, we recommend no more than a 4000 stall for street applications.

A few notes about the torque converter clutch options you can choose from. Any builds over 700HP OR those that want to lockup their converter under wide open throttle need to select multi clutch (triple disc) option. Locking up a single clutch converter under wide open throttle will quickly destroy it. The single disc converters are only to be locked up under cruising conditions and never under heavy throttle. The triple disc converters will engage lockup a bit firmer than the single discs. Due to this, we highly recommend a billet input shaft to be installed in your transmission when using a triple disc torque converter.

After making your selections and putting the item in your cart. You will be prompted to fill out our converter build sheet before submitting your order. Using the selections, you selected and your build sheet, the engineers at TSI will hand craft a custom converter for your specific application. We do not sell “off the shelf” converters. Each is hand tailored to your application! Our converters feature the following:

  • Furnace brazed and tig reinforced impeller
  • Furnace brazed and tig reinforced turbine
  • Billet cnc machined front cover
  • Billet 4340 Impeller hub
  • Billet 4340 Turbine hub
  • Ultra Wide Single Disc Friction (standard)
  • Triple Disc Ultra Wide Friction option (upgradeable)
  • Billet Apply Piston
  • Integrated Anti Balloon Plates using our Flanged Impeller hub
  • Torrington bearings throughout, no plastic or bronze thrust washers
  • Precision internal clearances to maximize coupling on the big end
  • Computerized balancing to insure smooth operation
  • Robotic welding for a leak free converter while saving weight
  • Pressurized and leak tested after welding
  • Maximum runout of .005”
  • Hand built to your specifications by our engineers

Additional information


GM / Chevrolet

Fuel Type


Transmission Type


Stall Speed

2500-2800, 2800-3200, 3200-3600, 3600-4000, 4000-4500




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