49452 Night Stalker RPM Torque Converter (for GM

The ACC Performance 49452 Night Stalker torque converter is a Level 2 performance converter engineered for GM 4L60E, 4L65E, and 4L70E automatic transmissions paired with LS series engines. It offers a stall speed range of 2200-2800 RPM, optimizing it for street/strip applications where improved launch and acceleration are desired. This converter is equipped with a lock-up clutch for efficient highway driving and reduced heat. Constructed for durability and performance, the Night Stalker features an extreme duty stator, a thicker lock-up liner, and new Torrington-style bearings. These enhancements are designed to handle increased power output and effectively reduce heat generated during demanding use. Its 300mm bell housing size and compatibility with the 2-step input shaft make it suitable for 1998 and up GM transmissions. Key specifications include a 30-spline count, and a 1.703-inch crank pilot. The overall diameter is listed as 12 inches (Jegs) or 9.60 inches (Boss Hog, potentially core diameter), with bolt circles around 11.063-11.125 inches. Installation of a torque converter typically requires removal of the transmission, making it a moderate difficulty task. Users should expect the process to take 4-8 hours, involving specialized tools for transmission removal and reinstallation. It's recommended to replace the transmission fluid and filter during installation. This torque converter is specifically compatible with a wide range of GM trucks, SUVs, and performance cars that came equipped with LS series engines and 4L60E, 4L65E, or 4L70E automatic transmissions from 1998 onwards. This includes models such as the Chevrolet Corvette, Camaro, Silverado, Suburban, Tahoe, and SSR; GMC Sierra and Yukon; Cadillac Escalade; Pontiac Firebird/Trans Am, and GTO; and Hummer H2.