Metal geared servos are recommended for these applications even if under 12lbs

Genuine HPI Racing part #3187

Tires Conveniently Pre-Mounted to Mini-B™ White Rear Wheels

this transmission only works and fits Cayman Kits

Multi-piece clamp-style wheel construction

New Kyosho 74033-04 Piston & Cylinder Set For (KE15SP) Engine Slot Car Metal geared servos are recommendedNew Kyosho 74033 04 Piston & Cylinder Set For (KE15SP) Engine The Kyosho 74033 04 is a genuine piston and cylinder set designed for the KE15SP engine. This replacement set restores compression and performance to your nitro engine. Part number: 74033 04 Fits: KE15SP Engine Includes: Piston, Cylinder