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XRAY presents authentic option parts for XRAY XRAY T4 & X4 cars:

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#302240-M X4 Composite Hub - Medium

• Medium composite mixture
• Improves mechanical traction
• Increases side bite
• For low traction asphalt tracks and very-low grip carpet tracks
• 1 pcs in set
• Fits X4 & X4F


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Precision-molded medium composite hub for X4 platform. Medium composite is softer than Graphite material and thus generates more mechanical grip on the car and improves side traction. Recommended for low traction asphalt tracks and very-low grip carpet tracks.

The hubs allow full adjustability of the axle height to adapt the car to every condition.

The aluminum front steering plates and rear ARS plates are easily mounted depending on the hub's location.

The design of the hub is universal with the same part used at all four corners with corresponding extensions.




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#302134-XS X4 CFF™ Upper Arm - Inner Shock Position - Extra Soft -FR/RL
#302144-XS X4 CFF™ Upper Arm - Inner Shock Position - Extra Soft -FL/RR

• Extra soft design with thinner carbon
• For very-low and low traction asphalt & carpet
• Improves mechanical traction
• Increases side bite
• More forgiving to drive
• Slightly more fragile

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Extra soft arm with thinner carbon generates more mechanical traction of the car and improves side traction. Recommended for very low & low traction asphalt and carpet tracks. The softer arm is slightly more fragile.

The upper arm shape conforms around the inner shock position for proper clearance without compromising strength and improve steering and both forward traction and lateral traction. This design improves durability and eliminates radial play for maximum precision and control from the upper arms.

The upper arms are made using a CFF™ - Carbon Fiber Fusion, for outstanding handling.

This upper arm will fit on the front right, as well as the rear left side of the car. Extra soft hardness.

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#302831 X4 Anti-Roll Bar UAM Front 1.1mm - Under Arm Mount
#303831 X4 Anti-Roll Bar UAM Rear 1.1mm - Under Arm Mount
#303833 X4 Anti-Roll Bar UAM Rear 1.3mm - Under Arm Mount

• UAM anti-roll bars for X4
• Under arm mounting
• Ball-bearing mounting system
• Complete range for super-fine tuning
• Laser-engraved stripes for easy identification

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Anti-roll bar for ball-bearing roll bar mounting system and designed to work with the lower suspension arms. The anti-roll bar system is mounted to the bulkheads via bearings from outside for extra-smooth movement and for quick & easy changes and adjustment. The roll bar turns in ball-bearings for maximum precision and free movement. Anti-roll bar height is adjustable via a screw...quick & easy.

Anti-roll bar has laser-engraved stripes (corresponding to bar thickness) for easy identification.

Anti-roll bars are mounted under suspension arms for ultra-low CG.



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#302640-T X4 Adjustable Camber Screw 14mm M4 L/R - Titanium (2)

• Ultra lightweight
• Lowers CG
• High grade titanium material
• 50% lighter than steel
• Made by XRAY
• Made in Europe
• Fits X4, X4F, X1’23-24

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Specially made 14mm M4 screw, threaded on both ends, to connect the upper CFF arm with the outer ball cup.

Manufactured from high grade titanium material, for weight savings over the steel screws. Set of 2.



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#301233 X4 Rubber Bumper 3D with Inner "H" Profile

• Durable material doesn’t fold or break
• High aerodynamic efficiency
• Shape improves front body support
• More airflow for more front grip
• Inner “H” profile for lightweight design
• Fits X4

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Rubber 3D printed bumper is exceptionally light as well as durable, thanks to "H" profile which allows for the cells of the bumper to be made super thin yet still lightweight and carrying the desired compression characteristics. The 3D printed material doesn't fold or break in crashes, and allows more airflow under the body, improving front traction.

Fits all X4 kits.




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#301020 X4'24 Alu Flex Chassis 1.5mm - Swiss 7075 T6


• Special 1.5mm thick aluminum
• Unique flex characteristics
• Generates more overall traction
• Improves steering
• For low to medium traction carpet conditions & high traction asphalt
• Specially designed flex cut outs
• 84mm wide
• Must be used with optional 110° screws


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Special 1.5mm thick aluminum chassis with unique flex characteristics generates more overall traction and improves steering. Suitable for low to medium traction carpet conditions, as well as high traction asphalt tracks. The narrow chassis is 84mm wide with tapered bottom edge of the chassis to reduce contact between the chassis and the ground during cornering to improve speed. Specially CNC-machined countersunk screws from HUDY Spring Steel #913305 (M3x5), #913308 (M3x8) and #913312 (M3x12) must be used to make the assembly possible. Optional screws are available also as a complete set #913300 featuring 33pcs of special 110° screws to completely install the chassis.









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#302064-K Alu Adjustable Ball-Bearing Hub +1mm - Black (2)

• +1mm hubs for extra high axle position
• Extra high position improves rotation
• Fine set-up tuning
• Increases drivetrain efficiency
• Stronger
• Reliable
• Longer life span
• Swiss 7075 T6 aluminum
• Black coated
• Laser engraved
• Fits X4 & X4F

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These +1mm hubs allow for extra high diff or solid axle position compared to the kit eccentric parts. The extra high position improves rotation.

These beautiful 7075 T6 aluminum adjustable ball-bearing hubs are direct replacement of the standard composite ones included in the kit. The aluminum hubs reduce the friction and make the car to run more free with increased the drivetrain efficiency.

The aluminum hubs are stronger and more reliable with increased life span. Black coated. Set of 2.

Fits: X4, X4F





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#303826 X4 Anti-Roll Bar Rear 1.6mm
#303828 X4 Anti-Roll Bar Rear 1.8mm

• Designed for X4F to improve rotation
• Ball-bearing mounting system
• Super-fine tuning
• Fits X4 & X4F
• Laser-engraved stripes for easy identification


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Rear anti-roll bar for ball-bearing roll bar mounting system works with rear suspension arms. The anti-roll bar system is mounted to the rear bulkheads via bearings from outside for extra-smooth movement and for quick & easy changes and adjustment. The roll bar turns in ball-bearings for maximum precision and free movement. Anti-roll bar height is adjustable via a screw... quick & easy.

Anti-roll bar has laser-engraved stripes (corresponding to bar thickness) for easy identification.

Must be used with #303434 Alu Anti-Roll Bar Bushing o2.0mm - 6mm (2)

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Rear anti-roll bar for ball-bearing roll bar mounting system works with rear suspension arms. The anti-roll bar system is mounted to the rear bulkheads via bearings from outside for extra-smooth movement and for quick & easy changes and adjustment. The roll bar turns in ball-bearings for maximum precision and free movement. Anti-roll bar height is adjustable via a screw... quick & easy.

Anti-roll bar has laser-engraved stripes (corresponding to bar thickness) for easy identification.

Must be used with #303434 Alu Anti-Roll Bar Bushing o2.0mm - 6mm (2)



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#302553 X4 Alu Steering Plate With 7.5mm Spacing

• Steering plate with 7.5mm spacing
• Improves cornering speed
• Improves on-power steering
• Suitable for outdoor tracks with low to medium traction
• Wobble-free assembly
• Bottom mounting position for a precise steering lock adjustment
• Swiss 7075 T6 aluminum

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X4 steering plate with 7.5mm spacing improves cornering speed and on-power steering. Suitable for indoor and outdoor tracks with low to medium traction.

The bearings are factory pressed into the steering plate which eliminates play in the assembly. The steering plate allows for a screw and shim to be mounted to the bottom of the steering for a precise steering lock adjustment.

Machined from premium Swiss 7075 T6 aluminum and black coated.
Fits: X4




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#302240-H X4 Composite Hub - Hard

• Hard composite hub
• For low-medium traction asphalt & very-low carpet tracks
• Generates more mechanical grip
• Improves side traction
• Universal design fits front & rear
• Fits X4 & X4F



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Precision-molded Hard composite hub for X4 platform. Hard composite is softer than Graphite material and thus generates more mechanical grip on the car and improves side traction. Recommended for low-medium traction asphalt tracks and very-low grip carpet tracks.

The hubs allow full adjustability of the axle height to adapt the car to every condition.

The aluminum front steering plates and rear ARS plates are easily mounted depending on the hub's location.

The design of the hub is universal with the same part used at all four corners with corresponding extensions.



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#301078-L X4'23 Graphite Upper Deck - Split Rear - 1.6mm
#301079-L X4'23 Graphite Upper Deck - Split Front - 1.6mm

• Thinner graphite upper deck
• Split design with front wave
• For low to medium grip carpet conditions
• Improves steering and traction
• Improved durability
• Features multiple flex options
• Thinner 1.6mm graphite material



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#302133-S X4 CFF Carbon-Fiber Fusion Upper Arm - Soft - FR/RL
#302143-S X4 CFF Carbon-Fiber Fusion Upper Arm - Soft - FL/RR

• Soft CFF front upper arms
• For very low & low traction asphalt & carpet tracks
• Generates more mechanical grip
• Improves side traction
• Fits X4 & X4F


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Machined and molded from thinner premium-grade graphite and softer composite materials. The arms are super lightweight and very compact. Soft arms generate more mechanical grip on the car and improve side traction. Recommended for very low & low traction asphalt and carpet tracks. The softer arms are slightly more fragile.

The unique CFF suspension soft arms are an elegant engineering achievement that look great and perform even better on the track. Using XRAY's own developed manufacturing process, a carbon fiber arm and composite arm are molded together using a fusion process to produce a single CFF suspension arm.

The benefits of the CFF arms are tremendous. The thickness of the inner carbon fiber plate determines the hardness and flex of the arm. The composite around the carbon helps control its flex and rebound, resulting in a very consistent feel from corner to corner.



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#302121 X4 Front Roll-Center Spacer (2)

#302122 X4 Rear Roll-Center Spacer (2)


• Quick, precise & hassle-free roll-center adjustment
• Improves steering when used in front
• Improves rotation when used in rear
• Improves graphite durability in crashes when used in front
• Fits X4 & X4F

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Front/Rear roll-center spacer for XRAY X4 for placement below front/rear lower suspension arms. Silver color.

The front roll-center spacer uses ride height adjustment shims which enable quick and precise hassle-free roll-center adjustment.

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Rear roll-center spacer for XRAY X4 for placement below front lower suspension arms. Silver color.

The rear roll-center spacer uses ride height adjustment shims which enable quick and precise hassle-free roll-center adjustment.





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#302310 X4 Alu Caster Bushing Front 3° / Rear 0.5°/5.5° - 1 Dot (4)

#302312 X4 Alu Caster Bushing Front 5° / Rear 2.5°/3.5° - 3 Dots (4)

• X4 alu caster bushings in 3 different alternatives
• Quick and easy set-up changes in front / rear
• Reversed use in rear for more adjustment options
• Precisely machined from lightweight aluminum
• Set of 4 pcs

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Alu eccentric bushing for caster adjustment. Allows for 3 degrees of front caster, as well as for the rear in two steps, 0.5 or 5.5 degrees. Labeled with 1 dot.
Precisely machined from lightweight aluminum, black coated. Set of 4pcs. Different caster alternatives available.

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Alu eccentric bushing for caster adjustment. Allows for 5 degrees of front caster, as well as for the rear in two steps, 2.5 or 3.5 degrees. Labeled with 3 dtos.
Precisely machined from lightweight aluminum, black coated. Set of 4pcs. Different caster alternatives available.




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#301071 X4 Graphite Upper Deck 1.6mm

#301072 X4 Graphite Upper Deck - Split Front - 2.0mm

#301073 X4 Graphite Upper Deck - Split Rear - 2.0mm

• 3 different top deck alternatives
• Various flex settings
• Premium carbon fiber material



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#303767 X4 Brass Chassis T-Brace 8g

#303768 X4 Alu Chassis T-Brace - Swiss 7075 T6)

• T-brace designed for X4
• Alu or brace alternative
• Makes the car more stable
• Generates more traction
• Allows multiple flex settings
• Brass version puts weight in the center of chassis

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Alu & Brass chassis T-brace designed for X4 makes the car more stable, generates more rear traction and allows chassis flex adjustments to alter steering characteristics by adding and removing screws from the brace. Brass material puts weight in the center of the chassis and helps to lower the CG.

#303767 X4 Brass Chassis T-Brace 8g
#303768 X4 Alu Chassis T-Brace - Swiss 7075 T6



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