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B&M 20484 Nitrous Holeshot 3500 RPM Torque Converter GM TH400/425/350

(GMC G2500 1979-91, Sonoma 1991, K1500 1979-86, 1988-91, C1500 1979-86, 1988-91, K2500 1979-86, 1988-91, Jimmy 1970-91, C3500 1979-86, 1988-91 + 279 more models)

Part of: B&M Nitrous Holeshot Torque Converter GM

Other options in this family: B&M 20480 B&M 20482 B&M 20481

Manufacturer

Picture for manufacturer B&M

Part Number

20484
7 reviews
Sale Price

$675.95

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The B&M Nitrous Holeshot 20484 is a high-performance torque converter engineered for nitrous oxide applications and aggressive street/strip driving. Designed with a 3500 RPM stall speed, this converter delivers harder launches and quicker acceleration by allowing your engine to reach its power band before the vehicle begins to move. Compatible with GM TH400, TH425, and TH350 transmissions from the model years specified.

Performance Features:

  • 3500 RPM stall speed optimized for nitrous-equipped engines
  • Furnace brazed impeller and turbine for maximum strength and heat resistance
  • Anti-balloon plate reinforcement prevents distortion under extreme pressure
  • Needle bearing between stator and turbine reduces friction and heat buildup
  • Steel alloy pump drive tube for superior durability
  • Fully balanced and pressure tested to ensure leak-free operation

Application:

  • GM TH400/TH425 transmissions (1965-1991)
  • GM TH350 transmissions (1968-1981)

B&M Racing has been manufacturing high-performance transmission components since 1955, and each Holeshot converter is built to their exacting quality standards. This converter is ideal for vehicles running nitrous oxide systems, forced induction, or high-output naturally aspirated engines where increased stall speed improves launch characteristics and overall performance.

Products specifications

Fits

GMC G2500 1979-91, Sonoma 1991, K1500 1979-86, 1988-91, C1500 1979-86, 1988-91, K2500 1979-86, 1988-91, Jimmy 1970-91, C3500 1979-86, 1988-91, K2500 Suburban 1979-86, K3500 1979-86, 1988-91, C15/C1500 Pickup 1967-74, Safari 1985-91 + 275 more models

Package Contents

Torque Converter, Mounting Hardware

Anti Balloon Plate

Yes

Prop 65

No

Stall Speed (RPM)

3200-3500

Trans Model

GM- TH375 (Auto) 3 Speed

Trans Model

GM- TH400 (Auto) 3 Speed

Bolt Circle Diameter

10.750 in./11.500 in.

Crank Pilot Diameter

1.710 in.

Mounting Stud

No

Trans Model

GM- TH425 (Auto) 3 Speed

Trans Model

GM- TH350 (Auto) 3 Speed

Additional Contents

New needle bearings

Automotive Item Grade

High Performance

Bolt Circle Diameter (in)

10.75

Brand

B&M

Category

Transmission

Crank Pilot Diameter (in)

1.71

Emission Code

5

FlexPlate Bolt Circle

10-3/4", 11-1/2"

Flexplate Change Needed

No

Furnace Brazed

Yes

Grade Type

Performance

Input Spline

30

Lock Up Type

No

Lockup

No

Material

Steel

Mounting Studs

No

Product Type

Automatic Transmission Torque Converter

Spline Quantity

30

Stall

3200-3500

Stall Speed

3,200-3,500

Sub Category

Transmission Hard Parts

Torque Converter Series

Nitrous Holeshot

Transmission

TH375

Transmission

TH425

Transmission

TH400

Transmission

TH350

Transmission Model

TH400, TH425, TH375, TH350

Best prices by far. But when I received my part which was right but not for year that pickup is so I have go through the process of returning it

Very easy to use

easy

very easy

Very easy check-out..........

needs to be easier to make sure part numbers are correct for shocks for lifted and unlifted vehicles

The items shipped and arrived really fast. This was a great transaction even though shipping was a little high.

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