This is the ST Racing CNC Machined Transmission Layshaft for AE Clutch Used on the Traxxas Slash 2WD, Rustler, and Stampede FEATURES: This HD Layshaft allows the use of the Associated slipper clutch system which allows for more consistent slipper feel and more spur gear options to accommodate for gear ratios of today’s brushless motor. The AE clutch system also allows the spur gears to run more true and less likely to tweak during rotation. AE clutch parts are required to complete this assembly and are not included. INCLUDES: One layshaft SPECS: Length: 51mm (2") Diameter: 5mm (3/16") COMMENTS: The parts needed to complete the assembly are AE Parts Needed: 6629 Slipper Clutch Nut x1 (ASCC3805) 9605 Slipper Clutch Spring x1 (ASCC9605) 9604 Slipper Hubs x2 (ASCC9604) 9603 Slipper pads x1 (ASCC9603) Spur gear choices 9649 72T (ASCC9649) 9650 75T (ASCC9650) 9651 78T (ASCC9652) 9652 81T (ASCC9651) 9653 84T (ASCC9653) 9/27/12 phijwa