CNC-machined chassis made from 3mm high-quality Swiss 7075 T6 aluminum

Strategic machining for ultra-light weight and uncompromised strength & rigidity

XRAY Multi-Flex Technology™

Optimized weight distribution and balance

Engine parallel with chassis centerline, center diff positioning for straight-line central drive shafts

Countersunk screw holes on chassis bottom for smooth underside

Pre-drilled holes for additional balancing weights

Pre-drilled centerline holes for use with HUDY Chassis Balancing Tool

1-piece electronics assembly is compact and easy to remove

Large, easy-access, molded radio box

Extremely durable diff bulkheads provide easy diff access for tuning and maintenance

Extra-thick, premium-grade graphite shock towers

Front & rear stiff composite braces

Engine & Clutch

High-grade, CNC-machined aluminum engine mounts are extended to provide higher reinforcement of the chassis in the longitudinal direction

High-torque clutch for smooth and continuous power transfer at high RPM

Swiss 7075 T6 aluminum flywheel has a smaller diameter but increased weight for smoother and more balanced engine operation

Small, lightweight Swiss 7075 T6 clutch shoes for improved wear and increased lifespan

Extra-tough Hudy Spring Steel™ flywheel nut

Smooth-flowing, efficient 2-part air filter

Extra-strong fuel tank made from special composite mixture features an integrated floating stone filter and internal baffles to ensure constant fuel supply

Fuel tank mounting with rubber grommets to absorb vibration


Well-proven, high-performance braking system for strong, precise and dependable braking performance.

Laser-cut, precision flat-ground steel brake disk is hand-ground for true, wobble-free rotation

Special high-grip brake pads installed on laser-cut brake plates

Rigid, high-precision machined brake cams


Conventional shaft-driven 4WD off-road drivetrain

Front & rear gear differential with adjustable oil viscosity featuring 46T crown gears and 14T pinion gears

Central differential with adjustable oil viscosity featuring 46T spur gear with standard 13T engine clutchbell

Front, central, and rear CVD drive shafts manufactured from HUDY Spring Steel™

Central larger and stronger outdrives feature protective rubber boots, thick 3mm pins, and a protective locking ring

Ultra-lightweight 17mm wheel hex drive hubs CNC-machined from Swiss 7075 T6 black-coated aluminum

Full set of 24 high-speed, blue-sealed ball-bearings ensure maximum efficiency


High-precision gear differentials

Rubber-sealed composite differential housings with steel inserts

Differential internal gears made from pressed steel, heat treated, and machined for ultra high precision and smooth operation

Super-lightweight diff outdrives machined from HUDY Spring Steel™

Easy access to center differential

Center diff housing is sized to accommodate optional spur gears

Differential main gears manufactured from HUDY Gear Steel


XPBS™ (Pivot Ball Suspension) is a unique concept, an XRAY innovation, and smart R&D design

Ultra-robust pivot ball suspension with integrated suspension geometry adjustment; different kingpin plates being the only optionally-available tuning parts

Integrated Suspension Settings™ (I.S.S.) for quick & easy suspension geometry setting

Suspension arms with optimal length, thickness, flexibility, geometry of suspension points, and material characteristics

Suspension arms are the result of extensive design knowledge and exhaustive testing

Exclusive composite mixtures developed in-house by XRAY offer the perfect balance between reliability and performance, rigid enough to provide a responsive feel yet soft enough to survive extra-long main events and impact

Extra-strong and robust front upper arms

Super-lightweight composite steering block and stiff Swiss 7075 T6 kingpin plate

Super-lightweight composite rear upright block and stiff Swiss 7075 T6 mounting plate

HUDY Spring Steel™ turnbuckles

Front & rear anti-roll bars manufactured from spring steel material


Simple yet effective dual-arm steering system

Integrated, easily adjustable servo saver

Swiss 7075 T6 aluminum steering plate

Quick & easy Ackermann and bumpsteer adjustment

HUDY Spring Steel™ turnbuckles


Big-bore, long-stroke shocks for ultimate reliability and performance

Shock bodies are externally hardcoated

Shock body external threading for quick & easy spring preload adjustment

Robust 3.5mm super-smooth polished shock shafts

Longer shock shafts & shock collar for increased downtravel

Ultra-fine shock protective rubbers for superior sealing against dirt

Big-bore pistons made from Delrin™ material for smooth operation and durability

Specially-formulated rubber shock membrane ensures equal damping

Lower shock assembly features multiple high-quality silicone O-rings for smooth, free, leak-free operation

Specially-designed shock springs have been specifically designed to complement the big-bore shocks

Shock springs are manually measured, selected and matched into pairs to guarantee precisely equal length and damping characteristics

Linear or progressive shock springs available

XRAY Premium Silicone Oils are manufactured in Europe by a specialized premium silicone oil manufacturer. Each batch of premium oil is laboratory tested and calibrated to ensure the highest possible consistency and quality batch-to-batch. Based on the industry-standard cSt rating, the new line of oils will be easy to identify, adjust, and feel.

Body & Wing

High-quality, low-downforce, low-profile, aerodynamic Lexan™ body perfectly fits the car and works in most track conditions

Tough composite side guards protect the car, muffler, and fuel tank from side hits. The side guards perfectly fit the chassis and seal against dirt. Ribs on the left side guard protect the fuel tank from muffler heat.

The side guards are specifically engineered as a part of the Multi-Flex™ adjustment system.

Stylish, effective, and strong rear wing is made from strong special composite mixture, designed to survive severe abusive and extreme crashes while keeping its shape

Rear wing holders made from special composite mixture to withstand abuse and crashes, and feature several different wing mounting positions

Optional mud guards may be easily installed on the rear suspension arms to protect the rear drivetrain in wet and dirty track conditions

Assembly & Support

Premium 3D full-color Instruction Manual & supplementary sheet

Exclusive Virtual Online Setup Sheet database with thousands of setup sheets for race tracks around the world

Premium, unmatched XRAY online support

Adjustment Possibilities:

The XB8 features fully-adjustable front and rear suspension geometry. For quick & easy adjustment, we recommend using set-up tools and accessories from HUDY, the world leader of RC tools. The extensive and impressive range of adjustment possibilities includes:







Ride height



Lower roll center

Upper roll center

Roll center positions

Bump steer



Adjustable shocks

Adjustable front and rear diffs

Adjustable XRAY Multi-Flex™

XB8 Specs:

Length: 503.5mm
Chassis length: 402mm
Wheelbase: 322~328mm
Width: 310mm
Weight: 2050g
Approximate running weight: 3350g
Chassis: 3 mm CNC-machined Swiss 7075 T6 hardcoated aluminum
Radio tray: Composite 1-piece
Central diff upper deck: Composite
Braces: Composite braces (front / rear)
Suspension: XPBS™ fully adjustable suspension
Rear suspension: Lower H-arm with adjustable upper camber link A arms
Front suspension: Zero Kingpin suspension ball suspension , 14° kingpin plate
Rear upright: Composite with dual arm mounting and 2 lower roll center positions and upper aluminum plate with 4 upper roll center positions and adjustable roll center height with adjustable shims
Shocks: Big-bore shocks with various shock pistons featuring Delrin pistons
Shock towers: Front 4.0mm graphite, rear 3.5mm graphite
Type: Full-time shaft-drive 4WD with center differential
Primary: Steel spur gear / clutchbell
Drive shafts: HUDY Spring Steel™ CVD drive shafts
Central shafts: HUDY Spring Steel™ CVD drive shafts
Differentials: Sealed, 6 gear, silicone-filled
Clutch: Aluminum 3-shoe
Bearings: Rubber-sealed
Pinion: 14T front / rear
Crown gear: 46T front / rear
Clutchbell: 13T
Spur gear: 46T
Body, Tires, Wheels & Misc
Body: XRAY XB9 low-downforce body
Tires: Not included
Wheels: Not included, standard 17mm hub
Fuel tank: 123cc capacity with capacity-adjustment segments, with hypertonic tank lid and internal stone-type floating filter
Adjustment Possibilities
Standard Adjustment: Camber, caster, toe-in, wheelbase, kick-up, anti-squat, lower & upper roll centers, kingpin, Ackermann, bump steer, Multi-Flex, weight balance
Items Not Included
  Engine, Exhaust system, Electronics (Radio, Receiver, Servos, Batteries), Wheels, Tires, Tools, Wheel tool, Receiver battery, Fuel, Switch, Start box, Glow heater, Paint, Charger, Universal tool for all nuts and turnbuckles, Set-up book.

All specifications are subject to change without prior notice. Pre-production prototype is shown, final specifications may slightly vary. In some pictures optional parts may be shown. All option parts are not included and must be purchased separately. The color of some aluminum parts may vary from kit to kit and some of the kits may not include all the orange or black parts as shown. Some of the spare parts or option parts may not be available at the moment in the orange or black color as shown. Some of the pictures show colored stickers on wing and radio tray, these are not included in the kit and are used in photos only for promotional purposes. The racing body included in the box is clear and unpainted.