Description_ASC |
Warning: The 3/4 RACE series converters are NOT designed to be used with Nitrous Oxide or Trans-Brakes
Note: HAYS recommends an external transmission cooler for all Twister 3/4 Race Converters
(A minimum size of 18,000 GVW or 15,000 BTU Rating.)
Note: Stall ranges will vary depending on engine set-up, weight of vehicle, and gear ratio (Please see converter selector in tech resources for more info)
*Bolts must be 3/8-16 x 3/4 to 1 inch in length and only use Grade 8 quality. |
Description_DEF |
Automatic Transmission Torque Converter |
Description_EXT |
Hays Twister 3/4 Race Torque Converter; 2400-2800 RPM Stall; 10 in. dia.; 10.5 in. Bolt Pattern; 26 Spline Input Shaft; 1.375 in. Crank Pilot; |
Description_DES |
Hays Twister 3/4 Race Torque Converter, Ford C4 Case-Filled |
Description_FAB |
3/4 Race series converters are built, tested, and proven to support up to 650 HP |
Description_FAB |
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 |
Description_FAB |
Each converter is hand-built and inspected in every step of assembly to ensure top of the line quality |
Description_FAB |
All HAYS converters are internally welded compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency |
Description_FAB |
Heavy duty Torrington bearings are used for greater strength and durability |
Description_FAB |
Stators are chosen with high flow vents and channels to promote cooling in heat producing higher horsepower applications |
Description_FAB |
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. |
Description_FAB |
3/4 Race series converters are offered in several different stall speeds for GM, Ford, and Chrysler transmissions |
Description_FAB |
Industry leading Tech Support Team is available to provide assistance with stall speed selection |
Description_KEY |
Transmission; torque converter; stall; flex-plate; bellhousing; drivetrain |
Description_INV |
CONVRTR, C-4 26 SPL CASE FILL 24-2800 |
Description_MKT |
Hays Performance Drivetrain is proud to announce Twister 3/4 Race Performance Torque Converters. These NEW torque converters are a perfect addition to Hays product line of performance flexplates, clutches, and flywheels. The 3/4 Race torque converter is the first series being brought to market and is intended for street/strip combinations, with various RPM stall speed offerings to accommodate any mixture of modifications including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss. |
Description_MKT |
The name 3/4 Race perfectly describes a torque converter suited for an application just shy of a Full Race version. We do plan to offer Full Race torque converters in the near future. |
Description_MKT |
Good names never go away, and neither should good terms! |
Description_MKT |
Hays Twister 3/4 Race Torque Converters! |
Description_MKT |
*Bolts must be 3/8-16 x 3/4 to 1 inch in length and only use Grade 8 quality. |
Description_SHO |
Torque Converter |
Lock Up/Overdrive |
No |
Crank Pilot Diameter |
1.375 in. |
Stall |
2400-2800 |
Bolt Circle Diameter |
10.500 in. |
Use with Power Adder |
No |
Input Shaft Spline Quantity |
26 |
Bolt size |
3/8-16 x 1, 3/8-16 x 3/4 |
Anti Balloon Plate |
No |
Diameter (in.) |
10.000 in. |
Lock Up Type |
No |
Transmission Model |
C4 Case-Filled |
Brand |
Hays |
Emission Code |
5 |
Input Spline |
26 |
Product Type |
Automatic Transmission Torque Converter |
Transmission |
C4 Case-Filled |
Series |
3/4 Race |
Use with Trans-Brake |
No |
Balanced |
Yes |
WARNING CA Proposition 65 |
Yes |
Trans Model |
Ford- C- 4 (Auto) 3 Speed |
Trans Year |
1963 |
Stall Speed (RPM) |
2400-2800 |
WARNING CA Proposition 65 Message |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
Anti-Balloon Plate |
No |
Bolt Circle |
10-1/2" |
Diameter |
10" |
Warning |
California Proposition 65 |
Length |
8.0000 |
Width |
13.0000 |
Height |
13.0000 |
Weight |
22.0000 |