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![Street Master Heavy-Duty Torque Converter for 1969-1979 GM TH350 and 1965-1990 GM TH400 Transmissions [12 in, 2500 Stall]](https://www.jegs.com/images/mini_750/500/512/512-gm25hd-12.jpg)
Vehicle Info NeededHUGHES PERFORMANCEPART NUMBER: 512-GM25HD-12
Street Master Heavy-Duty Torque Converter for 1969-1979 GM TH350 and 1965-1990 GM TH400 Transmissions [12 in, 2500 Stall]
$75099
Ships on 11/12/2026
Lowest Price GuaranteeHeavy-Duty Street Master Torque ConverterFits 1969-1979 GM TH350 and 1965-1990 GM TH400 Transmissions 2,500 RPM Flash Stall Speed 12 in Diameter Heavy-Duty Sprag for Added Durability Sold Individually
Add durability to a hard-launching TH350 or TH400 build with this heavy-duty Street Master torque converter from Hughes Performance, upgraded with a stronger sprag for repeated abuse.
Hughes Performance GM25HD-12 Automatic Transmission Torque Converter Features:
- Raises flash stall speed to 2,500 RPM to eliminate a slow, sluggish launch
- Fits 1969-1979 GM TH350 and 1965-1990 GM TH400 transmissions
- 12 in diameter
- Heavy-duty sprag upgrade for added durability over the standard Street Master
- Sold individually
Part TypeAutomatic Transmission Torque Converter
BrandHUGHES PERFORMANCE
Package Height4.0
Package Width12.0
Package Length30.0
Part CategoryPerformance Parts
TransmissionTH350, TH400
QuantitySold Individually
Stall Speed2500 rpm
Part FitmentSemi Universal
Lockup CompatibleNo
Diameter12 in
Sprag TypeHeavy Duty
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
