Built for serious power and weight, this Street/Strip 4L80E features a 34-element intermediate sprag, high-energy band, new overdrive sprag and low roller assemblies, performance frictions, recalibrated valve body, performance pump, steel forward hub, and all-new solenoids/harness for crisp, durable shifts. Designed for up to 800 hp/650 lb-ft, it uses a standard shift pattern and accepts HGM Compushift control in swaps. Converter not included; a quality cooler is strongly recommended.