Two spring sets: black (soft) and silver (stiff)

The initial production run featured a distinctive 3-piece bolted transmission housing

CNC Hardened Steel Construction

Gear pitch: 48 pitch

CNC Machined Harden Black steel Use with stock slipper clutch Replaces stock nylon spur gear YOU WILL RECEIVE 87T Metal Spur Gear

Power Hobby - 4S 14.8V 7200MAH 60C Hard Case Lipo Battery, w/ Deans Connector ASC40117C Two spring sets: black (soft)4 cell 7200mAh 60C lipo is perfect for 1 10 & 1 8 scale cars, trucks, and buggies and Boats. Features a huge capacity for extended run times and a gigantic C rating so you'll have all the power you'll ever need. High end performance and reliability at an affordable price Perfect for 1 10 & 1 8 scale cars, trucks, , buggies , boats Features: Suggested Charge Rate: 2C Specifications: Length : 139mm Width : 47mm Height : 49mm Weight : 21. 9oz