Boss Hog 47011 Night Stalker Torque Converter | GM TH350/TH400 | 1600–2200 RPM Stall

The Boss Hog 47011 Night Stalker Series Torque Converter is built for GM TH350 and TH400 automatic transmissions and offers a stall speed range of 1600–2200 RPM. It features a factory 12" core and a 10.75" bolt circle, making it an excellent choice for near-stock or lightly modified street applications.

This converter is engineered with high-quality internals, including a hardened chromoly impeller hub, Torrington-style incased bearings, and a modified heavy-duty stator. It's digitally balanced, leak-tested, and made in the USA — built for reliability with no shortcuts.

Fitment Note: Will not interchange with TH350C. Compatible with TH400 when used with the correct flexplate.

Upgrade Tip: Choose the Street Bandit Series if you've upgraded two or more components like intake, cam, or exhaust. Use the Outlaw Racing Series for nitrous, turbo, or supercharger setups.

Key Features

• 1600–2200 RPM stall speed range
• Fits GM TH350 and TH400 (with correct flexplate)
• Will not fit TH350C
• 12" factory-style converter core
• 10.75" bolt circle
• 30 spline turbine hub (CNC machined)
• 1.703" crank pilot
• Bolt size: 10mm x 1.5 pitch (Class 10 or stronger)
• Hardened chromoly impeller hub
• Torrington-style incased bearings
• Modified extreme-duty stator
• No anti-balloon plate
• Fins are four-corner tack welded or furnace-brazed
• Leak and pressure tested
• Digitally balanced
• Steel construction, black painted finish
• Made in the USA
• Sold individually

Vehicle Fitment

• GM vehicles with TH350 transmission
• Also fits TH400 with correct flexplate
• Not compatible with TH350C
• Ideal for stock or lightly upgraded street builds

What’s Included

• 1x Boss Hog 47011 Night Stalker Torque Converter

Installation Tips

• Use Type F transmission fluid
• Install an auxiliary transmission cooler
• Apply blue Loctite on all torque converter bolts