Team Associated FT 4-Shoe Adjustable Clutch System Features : Patent-pending design allows for spring tension adjustments without changing springs. Make spring tension adjustments without removing engine, clutch, or any other components. Adjustable flywheel and spring cam are compatible with all existing Team Associated 4-shoe clutch components including shoes, springs, collet, flywheel nut, and flywheel pins. The FT 4-Shoe Adjustable Flywheel is made from hard anodized aluminum The FT Spring Cam is made from hardened steel Fits RC8B3 series and most 1:8 nitro buggies and truggies To upgrade your existing Team Associated 4-Shoe clutch to the new adjustable model: Use #81421 FT 4-Shoe Adjustable Flywheel and Spring Cam Use existing springs, shoes, collet, nut, pins and clutch bell Requires one M3x5 mm set screw, AE #89219 Requires red thread-locking compound To upgrade your existing non-Team Associated clutch or to build the adjustable model with all new components: Use #81420 FT 4-Shoe Adjustable Clutch System. All hardware is included. Requires red thread-locking compound #81420 contents: qty 1 Flywheel, 4 Shoe Adjustable qty 1 Spring Cam, 4 Shoe Adjustable qty 4 Clutch Shoe Springs, 0.95mm qty 2 Composite Clutch Shoes qty 2 Aluminum Clutch Shoes, hard qty 1 Clutch Nut, 4 Shoe Clutch qty 1 Brass Collet, 4 Shoe Clutch qty 4 Clutch Shoe Pins, 4 Shoe Clutch qty 1 Set Screws, M3x0.5x5mm