
Original: $388.32
-65%$388.32
$135.91The Story
ACC Performance designed this Boss Hog 4840HD Night Stalker Lock Up Torque Converter for towing with GM 700R4, 200-4R as well as TH-200C transmissions using LT type engines. This hand-built 12” converter has a stall speed of 200-300 RPM over stock, and can handle up to 500 horsepower!
All Boss Hog torque converters are welded at the fins, not furnace-brazed, eliminating erosion over time. They include industrial-strength Torrington-type bearings that handle more torque than light-duty needle bearings. Aircraft aluminum washers instead of inferior fiber washers ensure all power transfers directly to the ground.
Boss Hog 4840HD Night Stalker Torque Converter Features:
- Fits GM 700R4/200-4R/TH-200C transmissions with LT type engines
- Torque Converter Use: Towing
- Stall Speed: 200-300 RPM over Stock
- Diameter: 12.00 in.
- Bolt Circle: 10.750 in.
- Input Spline Quantity: 27
- Crank Pilot Diameter: 1.703 in.
- Mounting Hardware Type: M10 x 1.5 Bolts
- Mounting Hardware Included: No
- Balanced: Yes
- Transmission Cooler Required: Yes
- Lockup Compatible: Yes
- Anti-Ballooning Plate: No
- Quantity: Sold Individually
Note: Actual stall speed will vary depending on your vehicle's setup. Use Type F transmission fluid for best results also.
Boss Hog recommends a “Street Bandit” series torque converter if you have upgraded intake, headers, exhaust, cam, or gearing. An “Outlaw” series torque converter is highly recommended if you have a Trans Brake, Nitrous Oxide, Turbocharger or Supercharger.
ACC Performance Boss Hog Torque Converters: An Outright Leader In The Industry!

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
ACC Performance designed this Boss Hog 4840HD Night Stalker Lock Up Torque Converter for towing with GM 700R4, 200-4R as well as TH-200C transmissions using LT type engines. This hand-built 12” converter has a stall speed of 200-300 RPM over stock, and can handle up to 500 horsepower!
All Boss Hog torque converters are welded at the fins, not furnace-brazed, eliminating erosion over time. They include industrial-strength Torrington-type bearings that handle more torque than light-duty needle bearings. Aircraft aluminum washers instead of inferior fiber washers ensure all power transfers directly to the ground.
Boss Hog 4840HD Night Stalker Torque Converter Features:
- Fits GM 700R4/200-4R/TH-200C transmissions with LT type engines
- Torque Converter Use: Towing
- Stall Speed: 200-300 RPM over Stock
- Diameter: 12.00 in.
- Bolt Circle: 10.750 in.
- Input Spline Quantity: 27
- Crank Pilot Diameter: 1.703 in.
- Mounting Hardware Type: M10 x 1.5 Bolts
- Mounting Hardware Included: No
- Balanced: Yes
- Transmission Cooler Required: Yes
- Lockup Compatible: Yes
- Anti-Ballooning Plate: No
- Quantity: Sold Individually
Note: Actual stall speed will vary depending on your vehicle's setup. Use Type F transmission fluid for best results also.
Boss Hog recommends a “Street Bandit” series torque converter if you have upgraded intake, headers, exhaust, cam, or gearing. An “Outlaw” series torque converter is highly recommended if you have a Trans Brake, Nitrous Oxide, Turbocharger or Supercharger.
ACC Performance Boss Hog Torque Converters: An Outright Leader In The Industry!


















