GM 350/400 10in Big Shot Torque Converter

The GM 350/400 10in Big Shot Torque Converter by Transmission Specialties is purpose-built for serious street and strip performance applications where stock transmission response simply won't cut it. This heavy-duty converter is engineered for high-horsepower LS-platform engines and modern GM performance builds that demand superior launch characteristics and rapid acceleration off the line. Whether you're upgrading a drag-focused vehicle, street machine, or high-output truck, this converter transforms how your transmission engages power delivery from idle through full throttle.

Transmission Specialties engineered this 10-inch converter with a tight stall speed designed to maximize torque multiplication at launch while maintaining drivability under load. The "Big Shot" design features a robust internal structure optimized for LS engine platforms, reducing parasitic losses and improving overall efficiency compared to factory units. At 29.4 pounds, this converter is precision-balanced to eliminate vibration and ensure smooth operation across the entire RPM band, critical when running elevated boost or naturally aspirated high-compression builds that stress stock torque multiplication.

This converter is ideal for builders and mechanics upgrading 350 and 400 cubic-inch displacement engines or modern LS-swapped vehicles seeking aggressive acceleration response without excessive slippage or heat generation. Installation requires proper transmission alignment and torque converter balance verification to ensure longevity under sustained high-load conditions. Compatibility extends across square-bore GM applications, though consultation with your transmission builder or engine builder is recommended to verify stall speed selection matches your specific power output and intended use case for optimal performance.