355086 & 355087
Diff Pin & Insert - Aluminum Heat-Resistant
More diff stability with a lighter drivetrain.
XRAY XB8 Option Parts
XB8 option & hop-up parts.
Performance upgrade parts for the XB8, with notes on why each one is worth running and under which track conditions it helps most.
Dirt
Most important for 1/8 dirt racing.
The upgrades that matter most for durability and consistency over bumps and jumps.
355432, 355635 + 355415
Center Dogbone Driveshafts
More forward traction and easier maintenance.
355222
Universal Joint Driveshaft (Front & Rear)
More free suspension movement, suited to high-traction or bumpy conditions, with easier maintenance — for both front and rear.
350912
Rear Upright - Aluminum Multi-Adj. Set
More stability and more setup options.
352370
Steering Plate - Aluminum (2-Dot)
More low-speed steering — trades off slightly more difficult high-speed handling.
351236 + 351221
Steel Chassis Protectors
Longer chassis lifetime.
354057
Carbon Center Diff Mount Plate
Better stability, more consistent braking and better heat resistance.
354113
Ventilated Brake Discs
More consistent brake feel with a lighter drivetrain.
358709 + 358718
Engine Monoblock Mount (FX Engine Stands)
Better stability and easier maintenance — no need to re-set gear mesh.
293409
Servo Horn - Aluminum, 3-Hole 25T
More rigid for more precise steering.
Full Reference
Complete XB8 option parts catalog.
Every hop-up part I consider for the XB8, with a note on the trade-off it makes.
| Part # | Part | Why / trade-off |
|---|---|---|
| 352120 / -M / -G | Front Lower Arm - Soft/Medium (Kit)/Graphite | Sets front-end compliance vs stiffness. |
| 352135 / -M / -G | Front Upper Arm - Soft/Medium (Kit)/Graphite | Sets front upper-arm compliance vs stiffness. |
| 352194 | Front Upper Arm Wing - Lexan | Adds front-end aero downforce/stability. |
| 352244 / -H / -G | Steering Block - Medium/Hard (Kit)/Graphite | Sets steering precision vs impact compliance. |
| 352366 / 352367 / 352368 | Steering Plate - Carbon (1/2/3-Dot) | More dots give finer Ackermann adjustment. |
| 352370 / 352372 | Steering Plate - Aluminum (2-Dot/1-Dot) | Aluminum alternative to the carbon steering plate. |
| 352489 - 352498 | Front Anti-Roll Bar - 1.8mm to 2.8mm | Sets front roll stiffness. |
| 353115 / 353116 / -XH / -G | Rear Lower Arm - Medium/Hard (Kit)/X-Hard/Graphite | Sets rear-end durability vs compliance balance. |
| 353354 / -H / -G | Rear Upright - Medium/Hard (Kit)/Graphite | Sets rear toe/roll-center stiffness. |
| 350912 | Rear Upright - Aluminum Multi-Adj. Set | Lets you fine-tune rear ride height/diff position. |
| 353420 - 353432 | Rear Anti-Roll Bar - 2.0mm to 3.2mm | Sets rear roll stiffness. |
| 351350 / 351351 | Top Deck - Composite (Kit)/Carbon | Carbon stiffens the chassis against torsional flex. |
| 351159 / 351159-S | Chassis Side Guard - Standard (Kit)/Soft | Softer guard flexes instead of cracking on hard impacts. |
| 353250 | Side Guard Brace - Carbon | Reinforces the chassis side guards. |
| 353082 / 353280 | Rear Brace - Composite (Kit)/Carbon Set | Carbon reinforces the rear chassis/radio tray against twist. |
| 355221 / 355222 | Front Driveshaft - CVD (Kit)/Universal | Universal joint option for different durability/angle needs. |
| 355427 / 355432 | Front Center Shaft - CVD (Kit)/Dogbone | Dogbone is a simpler, more durable alternative under hard impacts. |
| 355625 / 355635 | Rear Center Shaft - CVD (Kit)/Dogbone | Same durability trade-off at the rear center shaft. |
| 355211 / 355215 | Rear Drive Axle - Standard (Kit)/Adjustable | Adjustable axle lets you fine-tune rear driveshaft engagement. |
Part numbers reference official XRAY option parts codes — always double-check current codes against XRAY's official parts list before ordering.