TH400 Extreme Duty Forward Drum & 300M Input Shaft 35-Spline or straight pieces of exhaust

or straight pieces of exhaust tubing

Built for performance

These Speedmaster dual feed fuel lines are a great addition to any fuel system

superior RFI suppression

This gives you the ability to run a much stronger and reliable transmission to your high performance engine

TH400 Extreme Duty Forward Drum & 300M Input Shaft 35-Spline or straight pieces of exhaustTake your GM TH400 transmission to the next level with this premium heavy duty forward drum and 300M input shaft combo. Engineered for high power street, strip, or off road use, this kit addresses the critical failure points of stock components with a focus on strength, precision, and reduced rotating mass.