Pro-Line PowerStroke Rear Shocks (2) (Slash) This is a set of two Pro-Line PowerStroke Rear Shocks, and are intended for use with the Traxxas Slash 2WD and 4x4 Short Course Trucks. Enhance the overall performance of your stock Slash or your ProTrac™ Suspension Kit Slash with PowerStroke Shocks PowerStoke Features: True dual-stage spring rate Aluminum body and shock cap Infinite spring pre-load adjustment Beefy 3.5mm shock shafts Injection molded, super durable spring retainer and shock ends Bladder sealed shock cap Free flow molded pistons Dual O-ring seats and upper and lower shock shaft guides Pre-assembled – just add oil! Fits stock Slash or ProTrac™ Suspension Kit for Slash What’s included: (2) Pre-assembled PowerStroke Performance Rear Shocks Pro-Line PRO-2 Traxxas Slash 2wd Traxxas Slash 4x4