Here is the latest from STRC:
ST Racing Concepts Traxxas Revo 3-shoe style complete racing clutch kit.
ST4142XB/S Revo 3-shoe Style Complete Racing Clutch Kit
ST4142C Replacement 3-shoe clutch springs and clutch shoe set
This option part is a must for serious Revo 3.3 MT racers. This complete kit includes a light weight CNC machined aluminum flywheel (40mm size for bump start use), CNC machined aluminum clutch shoes for precise clutch engagement and feel, special clutch nut for 3-shoe setup and matching tension clutch springs. This complete clutch upgrade will enhance the performance of your Revo 3.3 while also allowing the use of bump start to start your engine. Available in Racing Silver or Royal Blue anodizing. Replacement clutch springs and shoe set (ST4142C) is also available separately for rebuilding your clutch.
MSRP $29.99 for complete clutch kit
MSRP $16.99 for complet clutch shoes and spring rebuild kit
ST Racing Concepts
385 S. Lemon Ave.
Walnut, CA 91789