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  • 3/4 Race series converters are offered in several different stall speeds for GM, Ford, and Chrysler transmissions
  • All 3/4 Race series converters are built, tested, and proven to support up to 650 HP
  • Each converter is hand-built and inspected in every step of assembly to ensure top of the line quality
  • State of the art Spray Welding process is used in select areas. Spray Welding provides clean, strong and consistent fusion while also increasing strength through hardening from higher process temperature
  • All Hays converters are internally welded compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency
  • Heavy duty Torrington bearings are used for greater strength and durability
  • Stators are chosen with high flow vents and channels to promote cooling in heat producing higher horsepower applications
  • Increased horsepower and acceleration due to a weight saving, one application design. Almost all HAYS converters are built for one application to reduce weight compared to a multi-bolt pattern converter.
  • Industry leading Tech Support Team is available to provide assistance with stall speed selection

Our Hays Twister 3/4 Race product name perfectly describes a torque converter suited for an application just shy of a left race version.

Designed for both street and track use on naturally aspirated engines.


  1. Hays Twister Torque Converters are hand-built and inspected in every step of assembly to the highest quality
  2. Rear Cover/Impeller features fully Spray Welding hub assembly
  3. Bearings are high strength Torrington versions which offer unmatched strength and durability
  4. Stators with high flow vents and channels are chosen to promote better cooling high heat/high horsepower applications
  5. Turbine fins are internally welded which provides longer converter life while also enhancing consistency versus brazed fins
  6. Front cover is a single application design, not multi-pattern which reduces rotating weight and increases horsepower along with acceleration

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3/4 Race Torque Converters

Hays Twister 3/4 Race Performance Torque Converters are intended for street/strip combinations. Each designed to accommodate any mixture of modifications including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss.
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