B&M Nitrous Holeshot 3600 Torque Converter, 1965-91 GM TH400, TH425, 1968-81 GM TH350, TH375B,

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B&M 20482

B&M Nitrous HoleShot 3600 stall for 1965-91 TH400, 425 and 1968-81 TH350, 375 (Not TH350C) transmissions is an excellent choice for vehicles with engine modifications, particularly big cams that tend to reduce low end power and torque. The higher stall speed of this converter will launch the car in a higher rpm range where more torque is readily available, resulting in quicker acceleration. Nitrous Holeshot converters feature furnace brazed impeller and turbine, new precision steel alloy pump drive tube, new heavy duty needle bearings between the stator and impeller (not a thrust washer) and needle bearings between the stator and turbine. Other features include dual pattern 10.75 and 11.50-inch bolt circle, a new turbine hub, new springs and rollers in the stator and anti-balloon plates. The anti-balloon plates will allow these converters to stand up to the instant horsepower that a nitrous plate system delivers. Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated. These are serious converters for serious performance street cars. To prevent contamination left from worn parts being circulated in your new components causing premature wear, we strongly recommend protecting your investment by adding a B&M transmission cooler with all new transmission installations. Listed converters are NOT to be used in trans-brake applications. Not for use in trans-brake applications.

  • Needle Bearing Between Stator and Turbine
  • Higher Stall Speed, Quicker Acceleration
  • Anti-balloon Plate for Added Strength
  • Furnace Brazed Impeller and Turbine
  • Fully Balanced and Pressure Tested
  • Steel Alloy Pump Drive Tube
  • B&M Quality & Durability
More Information
PartB&M 20482
Manufacturer Part Number20482
UPC19695204822
BrandB&M
Bolt Circle Diameter (in)10.75
Emission Code5
MaterialSteel
Part TypeAutomatic Transmission Torque Converter
Stall Speed3400-3800
Stall Torque Ratio3400 to 3800 RPM stall
Transmission ModelTH400 TH425 TH375 TH350
Typeproduct

Additional ContentsNew needle bearings
Anti Balloon PlateYes
Anti-Balloon PlateYes
Automotive Item GradeHigh Performance
Bolt Circle Diameter (in)10.75
BrandB&M
California Proposition 65 RequiredNo
Crank Pilot Diameter (in)1.71
Emission Code5
Flexplate Change NeededNo
Furnace BrazedYes
LockupNo
MaterialSteel
Mounting StudsNo
Product TypeAutomatic Transmission Torque Converter
Stall Speed3400-3800
Stall Torque Ratio3400 to 3800 RPM stall
Torque Converter SeriesNitrous Holeshot
Transmission ModelTH400, TH425, TH375, TH350

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