HPI Savage 21/25 Graphite Side Chassis Upgrade HSA-001/1 by 3Racing  [HSA-001/1]

Stiff graphite side chassis for Savage trucks

The HSA-001/1 graphite side chassis is an aftermarket replacement made for HPI Savage 21 and Savage 25 vehicles. It replaces the stock side chassis with a graphite plate that increases torsional rigidity versus factory stamped or plastic panels.

Practically this means less chassis twist under throttle and on landing, producing a steadier steering feel and more repeatable suspension geometry. Swapping to graphite will change the truck's balance, so plan small suspension adjustments to match the firmer platform.

Fitting uses the original Savage rail mounting points; always check fastener alignment and bearing clearances during installation to prevent binding. The product is sold as a single chassis piece for scale RC use only.

Select this graphite side chassis when you need a firmer platform for tuning and more predictable handling on Savage 21 and 25 trucks.