4 inch couplers fit any standardized 24 spline motor including TM4, Siemens and Remy.

Note: This is just the splined slug, it will require additional machining to fit your specific vehicles flywheel or flexplate. A heat gun will be required to sweat fit them onto the motor shaft.

Please watch our monthly show to hear more about these couplers, fast forward to 9:00 minutes in.




Torque specs are as follows: Flywheel to Shaft Coupler (M10) Steel: 28 lb/ft
Motor to Motor Adapter Plate (3/8) Aluminum: 15 lb/ft
Pressure Plate to Flywheel (M8 or 3/8) Aluminum: 15 lb/ft
Motor Adapter Plate to Bell Housing (3/8) Stainless Steel: 13 lb/ft