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XRAY presents authentic option parts for XRAY T2, XRAY T2R, XRAY T2\'007,XRAY T2\'008, XRAY T2\'009, XRAY T3 and XRAY T4 cars:

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#305308 ECS BB DRIVE SHAFT 52MM - SET - HUDY SPRING STEEL™

#305309 ECS BB DRIVE SHAFT 53MM - SET - HUDY SPRING STEEL™

• Ball-bearing equipped ECS drive shafts
• Reduced friction between driveshaft and outdrive
• Ball-bearings replace composite blades
• Smoother handling feel of the car
• Increased cornering speed
• Two sizes available for particular track types
• Used by factory team for highest competition level races
• Works only for front solid axle with optional #305138 outdrives

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The new ECS BB (Ball-Bearing) driveshafts offer a significant performance gain over the standard blade-type driveshafts. The friction between the driveshaft and the outdrive is greatly reduced, which helps to give a much smoother handling feel, especially on fast direction changes, such as chicanes. The reduced friction helps to increase cornering speeds.

We recommend the shorter 52mm shafts for smaller, more technical tracks, where more initial steering is needed.

The 53mm shafts are best suited for more open and flowing track layouts. They will provide slightly less initial steering, but better steering in the middle of the corner, as well as on power.

Maintenance of these bearing driveshafts is necessary, but very simple. Build them as you would your normal ECS driveshafts, but with the following addition; we recommend using the Hudy Joint Grease (106213) between the small bearings and the outdrives, for a prolonged life of the parts.

Fits all T4



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#306410 Alu Universal Mount

• Use as battery backstop or fan mount
• Fits popular fan sizes
• Super-small
• Lightweight
• Black anodized

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Universal mount designed specifically for the T4 platform accommodates popular fan sizes including 30mm and 40mm fans but also can be used as a battery backstop on T4’20. The universal mount is installed on the bulkhead on the previous T4 version and on the motor mount on T4’20 rather than the chassis to eliminate any tweak and to ensure no vibrations are transferred to the chassis. A “must have” option part.

Fits all T4 & T4F’21



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309862 XRAY Stainless Steel Weight For Slim Battery Pack 35g



• 35g added weight
• Stainless steel material
• Inserted under battery directly on chassis
• Easier to drive
• Lower CG
• Helps to improve the balance of the car
• Makes the car easier to drive
• Fits standard 1/10 Touring Cars
• Dimensions: 135x33x1mm

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Specially-designed 35g stainless steel weight for placement under slim battery pack to add weight as low as possible. Helps to improve the balance of the car and makes the car easier to drive. Dimensions: 135x33x1mm. Fits standard 1/10 on-road cars. A “must have” option part.

Fits all T4




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#301962 T4'20 Graphite Shock Tower Front 3.0mm - SLP

#302962 T4'20 Graphite Shock Tower Rear 3.0mm - SLP

• Specially designed for SLP shocks
• For bumpy tracks
• Improves traction
• For low traction track conditions
• Improves chassis roll
• Premium grade graphite material

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The SLP (Super-Low Profile) front shock tower allows to mount the shocks lower to lower the CG. With the lower shock mounting, the car is more stable as it rolls less, is easier to drive over chicanes, and has improved steering response. Recommended for medium-high technical tracks, especially for carpet.

Made from 3.0mm thick premium-grade graphite material to guarantee maximum strength and long life. Recommended for use with SLP shocks, especially in extremely-low traction track conditions.

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The SLP (Super-Low Profile) rear shock tower allows to mount the shocks lower to lower the CG. With the lower shock mounting, the car is more stable as it rolls less, is easier to drive over chicanes, and has improved steering response. Recommended for medium-high technical tracks, especially for carpet.

Made from 3.0mm thick premium-grade graphite material to guarantee maximum strength and long life. Recommended for use with SLP shocks, especially in extremely-low traction track conditions.

Fits only T4´20


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#301003 T4'20 Alu Extra-Flex Chassis 2.0 mm - Swiss 7075 T6

• For low traction carpet tracks & high traction asphalt tracks
• More predictable handling
• 2mm thickness
• SWISS 7075 T6 Aluminum
• Black anodized

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Aluminum T4’20 chassis with special cutout openings for increased flex. This chassis is recommended for low traction carpet tracks and high traction asphalt tracks. (Not recommended for high- and very-high traction conditions where either the #301001 or #301002 chassis work better).

Fits T4´20

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#302202 Alu Steering Blocks with Graphite Extension Plates - Set

• Alu Steering Blocks
• Ultra-strong
• Durable
• Long life
• Composite bearing bushings
• Graphite Ackermann extensions
• Easy Ackermann adjustment
• Swiss 7075 T6
• Black coated
• Set of Left & Right

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Alu steering blocks with ultra-strong construction provides very long life and durability in even the most extreme racing conditions. Composite bushings are used to secure the ball-bearings in both sides of this steering block; this allows the ball-bearings to fit perfectly and turn freely, giving much higher lifetime compared to bearings installed directly into aluminum steering blocks. CNC-machined from premium lightweight T6 aluminum. Black coated. Set of Left and Right steering block.

Alu steering block is recommended for high traction conditions as it improves stability and makes the car turn smoother. The alu steering block is recommended for ARS as well as it allows greater toe in-out gain adjustment possibilities.

The graphite extensions mount to the steering block. Features same ackermann position as the standard composite steering block. The extension is can be mount either from the top or bottom.

Fits all T4




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#302350 T4'20 Alu C-Hub for ARS - 0° Deg.

• Alu C-hubs for ARS T4’20
• Perfect for fine tuning of toe-in characteristics of the rear tires during chassis roll
• Black coated
• Available in caster alternatives 0° - 2° - 4°
• Engraved foe easy identification
• Premium SWISS 7075 T6

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CNC-machined highest-quality aluminum C-hub for ARS suspension. Caster pre-set at 0 degrees.
Recommended for high-traction conditions as it generates greater off-power steering, rotation and cornering speed.
Machined from premium Swiss 7075 T6 aluminum and black coated.

Engraved with "0" for easy identification. Fits left or right sides. Includes two nylon bushings.

The C-hubs are available in standard caster angles (0°, 2°, 4°).

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#302351 T4'20 Alu C-Hub for ARS Right - 2° Deg.

#302352 T4'20 Alu C-Hub for ARS Left - 2° Deg.

CNC-machined highest-quality aluminum RIGHT & LEFT C-hub for ARS suspension. Caster pre-set at 2 degrees.

Helps to generate more traction but in the same time generates more off-power steering and cornering speed compared to standard rear suspension. Recommended for medium-traction conditions.

Machined from premium Swiss 7075 T6 aluminum and black coated.

Engraved with "2R" & "2L" for easy identification. Includes two nylon bushings.

The C-hubs are available in standard caster angles (0°, 2°, 4°).

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#302353 T4'20 Alu C-Hub for ARS Right - 4° Deg.

#302354 T4'20 Alu C-Hub for ARS Left - 4° Deg.

CNC-machined highest-quality aluminum RIGHT & LEFT C-hub for ARS suspension. Caster pre-set at 4 degrees.

Generates maximum traction. Recommended for very-low-traction conditions. As the wheelbase will be shortened a lot with this setting, it is recommended to lengthen the rear wheelbase by moving the rear arms fully back.

Machined from premium Swiss 7075 T6 aluminum and black coated.

Engraved with "4R" & "4L" for easy identification. Includes two nylon bushings.

The C-hubs are available in standard caster angles (0°, 2°, 4°).

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#300902 T4'20 ARS - Active Rear Suspension Set

• Complete active rear suspension for T4’20
• Changes toe-in characteristics of the rear tires during chassis roll
• Improves driving characteristics
• Great adjustment possibilities
• Includes 0° Alu –C-hub

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ARS™ suspension set consists of: suspension arms, alu 0° C-hubs, hard steering blocks, and ARS™ linkages which connect suspension holders with the suspension block. The angle of ARS™ linkages –set by adding/removing shims on the suspension block and suspension holder – changes the toe-in characteristics of the rear tires during chassis roll.

Designed particularly for the T4’20 platform.

Fits T4'20 & T4F'20


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#306199 Graphite Holder for Adjustable Battery Holder for Slim Batteries (2)

• Graphite holder specially designed for slim batteries
• Must be used with battery holder #306196-Alu or #306198-Brass
• Side balance adjustment left/right
• Fully adjustable holder in all directions
• Weight adjustment front/rear by 4mm
• Unique design
• Chassis-free tape instalment increases chassis flex & increases traction
• Graphite & Aluminum material
• Allows to decrease ride height

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CNC-machined battery backstop for the adjustable battery holder for positioning batteries fore-aft/left-right. Designed for the slim battery pack. Quick & easy weight transfer adjustment. Made from 3.0mm premium-grade graphite material.

Fits all T4




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#301961 T4'20 ULP Graphite Shock Tower Front 3.0mm - Low

#302961 T4'20 ULP Graphite Shock Tower Rear 3.0mm - Low

• Lower shock mount
• Increases stability
• Shock position lowered by 3.5mm
• Less roll
• Easier to drive
• Improves steering response
• For technical tracks
• For high and very high traction conditions
• Premium graphite material

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The Low Shock Tower allows to mount the shock absorbers lower by 4mm.
With the lower shock mounting, the car is more stable as it rolls less, is easier to drive over chicanes, and has improved steering response.

Recommended for medium-high technical tracks, especially for carpet.

Machined from premium-grade 3.0mm graphite, the shock towers are super lightweight and very compact.

Fits only T4’20


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#308308-K ULP Alu Shock Absorber - Set - Black (2)

• Ultra low profile shocks
• Lowers CG
• Improves Stability
• Easier to drive in chicanes
• More resistant to traction rolling
• Improves steering response
• Improves cornering speed
• Black anodized
• Set of 2pcs

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Set of black colored ULP shocks which lower the CG of the car even more to the absolute lowest to further improve stability. With ULP shocks the T4 stays flatter, making it easier to drive in chicanes and making it more resistant to traction rolling, letting you carry more speed through high-traction sweepers. Steering response and cornering speed are significantly improved as well.

With an intelligent design, the full range of existing XRAY SLP springs may also be used in the new ULP shocks, so you can still use the entire range of springs from previous T4 cars.

The XRAY aluminum shock absorbers come with all the necessary parts to build one pair of shocks (2 shocks). Springs and shock oil are not included and must be purchased separately.

Fits all T4


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#302812 T4'20 Anti-Roll Bar Front for Ball-Bearings 1.2mm
#302813 T4'20 Anti-Roll Bar Front for Ball-Bearings 1.3mm
#302814 T4'20 Anti-Roll Bar Front for Ball-Bearings 1.4mm
#302815 T4'20 Anti-Roll Bar Front for Ball-Bearings 1.5mm


• Ball-bearing mounting system
• Super-fine tuning
• Laser-engraved stripes for easy identification

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Front anti-roll bar for ball-bearing roll bar mounting system and redesigned to work with the front long suspension arms. The anti-roll bar system is mounted to the front 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.

Fits: T4’20




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#302173-H Front Suspension Arm Long Right - Hard
#302174-H Front Suspension Arm Long Left - Hard
#303173-H Composite Rear Suspension Arm Long Right - Hard
#303174-H Composite Rear Suspension Arm Long Left - Hard

• 7mm Longer
• Developed for low traction condition
• Improves stability
• Generates more traction
• Features lowered shock position which improves steering response
• Specially-formulated hard composite material
• Lightweight
• Integrated anti-roll bar mount

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Completely redesigned rear long suspension arm is 7mm longer than the short arms, which helps to generate more grip in low traction conditions and improves stability on higher traction surfaces.

The rear LEFT suspension arm features a standard shock mounting position as well as a new 4mm lower position to lower the CG (must be used with optional lower ULP shock tower). The lower mounting position improves the stability of the car in the chicanes and in technical corners and improves steering response.

Made from specially-formulated hard composite material and featuring an integrated anti-roll bar mount, the arm is very lightweight and can withstand the rigors of high-performance racing.

The hard material is slightly softer than the graphite material. Developed to generate more traction and recommended for very-low and low traction conditions.

Fits: T4’20


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#303731 T4'20 ALU LOWER 2-PIECE SUSPENSION 0.25 ECCENTRIC HOLDER


• 0.25° Eccentric suspension mount holes
• More precise toe-in setting
• SWISS 7075 T6 Aluminum
• Black coated
• Laser engraved

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Authentic XRAY alu rear lower suspension holder for the REAR of the front bulkhead, with 0.25° eccentric suspension mount holes. The eccentric holder stands allow more precise toe-in setting with 0.25° increments.

Suspension holders are CNC-machined from premium Swiss 7075 T6 aluminum, and provide the lightest & strongest possible support framework for the car.

Fits: T4’20


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#301061 T4'20 Graphite Upper Deck 1.6mm

• 1.6mm thickness
• Perfectly symmetrical
• Consistent flex behaviour
• For low-to medium traction
• Various flex settings
• Premium graphite material


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Top deck was designed to work with the center layshaft location in the middle of the chassis. The top deck is perfectly symmetrical to achieve the ideal, consistent flex behavior.

This 1.6mm graphite top deck is recommended for use in low- to medium-traction conditions with the alu chassis.

The top deck can be mounted via connecting stand using these flex alternatives:
1.) Soft setting – The top deck is not connected to the stand for maximum flex to generate maximum steering but can be more difficult to drive.
2.) Medium setting – The top deck is connected to the stand through a ball-bearing which allows the top deck to flex side-to-side but not front-to-rear.
3.) Stiff setting – The top deck is connected to the stand through a fixed bushing that completely stiffens the whole car for increased stability.

Fits T4’20


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#305578-O Fixed Pulley for Layshaft with Bearings 20T - Graphite (2)/a>



• Specially-formulated
• Graphite composite Material
• Increases Performance
• 20T
• Reduces friction
• For layshaft with bearing

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Precision-molded 20T layshaft pulley made of specially-formulated graphite composite material that is a perfect balance of reliability and performance. The special graphite composite mixture reduces friction and increases performance. Orange color. Set of 2.
Fits T4’20