This front and rear lower arm set is supplied for HPI Savage 21 use and is identified as model SAV1055E. The package includes the mounting screws, suspension pins and E-clips called out in the listing to support immediate installation into standard Savage 21 suspension points.
The alloy arms perform the same mechanical roles as the factory plastic links: they locate suspension geometry, transmit hub loads into the chassis and influence roll and steering characteristics. Alloy construction alters stiffness and wear behaviour compared with plastic; technicians should re-evaluate damping, spring rates and alignment after fitting to obtain the desired dynamic response.
Assembly notes: fit the arms with the supplied hardware, confirm pivot freedom and clearance around gearbox and driveshafts, and validate wheel alignment and ride height following assembly. This component is an aftermarket RC accessory intended for compatible model kits and chassis.
For workshop upgrades or routine replacement of worn plastic links, this alloy lower arm set with included hardware provides a dependable option for baseline suspension tuning and maintenance.