| Suspension arms | Reinforced composite or machined metal arms | Can improve resistance to bending or impact damage, helping maintain suspension geometry during hard use. | Metal arms may transfer more impact force to other suspension parts and can add unsprung weight. | High-impact driving, racing, and frequent suspension maintenance. |
| Shock absorbers | Rebuildable oil-filled shocks with adjustable settings | Allow damping and ride height to be tuned for track surface, vehicle weight, and driving style. | Setup depends on spring choice, oil viscosity, and track conditions; incorrect settings can reduce grip or control. | Track tuning and drivers seeking adjustable handling. |
| Steering components | Precision steering links, bellcranks, or steering knuckles | Can reduce flex and looseness, supporting more consistent steering response and alignment. | Compatibility and correct assembly are essential; overly tight linkages can bind. | Precision handling and replacement of worn steering parts. |
| Drivetrain shafts | Hardened steel or other high-strength drive shafts | Can improve durability under repeated acceleration and high drivetrain loads. | Material, fit, lubrication, and joint condition matter; stronger shafts do not prevent failures elsewhere in the drivetrain. | High-power setups and demanding running conditions. |
| Wheel hubs and hexes | Reinforced hubs or accurately machined wheel hexes | Can provide a more secure wheel interface and help reduce wear at the wheel-mounting connection. | Incorrect dimensions can cause wheel fitment problems or excess play. | Frequent wheel changes and replacement of worn mounting hardware. |
| Chassis braces | Additional or stiffer chassis bracing | Can change chassis flex and improve structural support under load. | Less flex is not always better; the ideal balance depends on the vehicle and surface. | Vehicles that need a tailored chassis-flex setup. |
| Bearings | Sealed replacement ball bearings | Reduce friction compared with worn or damaged bearings when correctly installed and maintained. | Dirt, water, poor installation, and neglected maintenance can shorten bearing life. | Routine maintenance and smoother drivetrain or wheel rotation. |
| Body and aerodynamic parts | Lightweight body panels, wings, or adjustable mounts | Can alter vehicle weight distribution and aerodynamic balance at speed. | Effects vary with vehicle design and speed; mounting position and body fit must be checked. | High-speed running and competition setups with room for testing. |