BIG ROCK
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Gear Box (Front/Rear) - Compatible w/ ARRMA 1/8
GPM
$65.90Function & Usage GPM upgraded aluminum gear box set designed for a wide range of ARRMA 6S and 8S vehicles. This 3-piece gear box set replaces the factory components with thicker 7075-T6 aluminum for...$65.90 -
Diff Gear Set (29mm Diff Case) - Compatible w/ ARRMA 1/8
GPM
MSRP: $28.90$26.90Original Part No:ARA310985 Part Location:Differential gear assembly Major Advantages of Upgrading to This Part/Product Made from high-strength 20CrMo steel for extreme durability and long service...MSRP: $28.90$26.90 -
Front Steering Assembly - Compatible w/ ARRMA 1/8
GPM
$26.90Original Part No:AR340065 + AR340073 + AR340060 Part Location:Front assembly of vehicle - Steering area Product Major Functions & Usage Improves and fine-tunes steering performance for more precise...$26.90 -
Rear Hub (Larger Bearings) - Compatible w/ ARRMA 1/8
GPM
$36.90GPM 7075 Aluminum Rear Hub Set for ARRMA 6S & 1/7 Models (AR330404 Upgrade) Original Part NumberAR330404 LocationRear Hub (Outside) Features & Benefits CNC machined from high-strength 7075 aluminum...$36.90 -
Rear Shocks (135mm) - Compatible w/ ARRMA 1/8
GPM
$34.90Function & Usage Rear damper assembly designed to reduce chassis vibration and maintain stable vehicle balance during acceleration, landing impact, and rough terrain driving. Upgrade...$34.90 -
Front Shocks (115mm) - Compatible w/ ARRMA 1/8
GPM
$32.90Function & Usage Front damper assembly designed to minimize chassis vibration and maintain stable vehicle balance during high-speed driving and impact conditions. Upgrade Advantages Constructed from...$32.90 -
Input Shaft Cup (Safe-D) - Compatible w/ ARRMA 6S
GPM
$19.90Function & Usage Safe-D input shaft cup set for ARRMA 6S driveline input, designed to pair with a Safe-D compatible input gear to help maintain consistent drive transfer under hard bashing. Upgrade...$19.90 -
Wheel Lock (17mm) - Compatible w/ ARRMA 1/8
GPM
$23.90Alloy 7075 Wheel Lock (17mm) Thread M12x1mm Function & Usage Secures the wheel on the outer side using a 17mm wheel lock with M12x1mm thread. Designed for quick install/removal while keeping the...$23.90 -
Out of stock
Front/Rear Complete Diff (Set of 2) - (No Diffs Oil) - Compatible w/ ARRMA 1/8
GPM
MSRP: $102.90$98.90Function & Usage Fully assembled front or rear differential designed to manage power distribution and traction while maintaining smooth drivetrain operation under high-load 6S and 8S conditions...MSRP: $102.90$98.90 -
Front/Rear Complete Diff - (No Diffs Oil) - Compatible w/ ARRMA 1/8
GPM
$59.90Function & Usage Fully assembled front or rear differential designed to manage power distribution and traction while maintaining smooth drivetrain operation under high-load 6S and 8S conditions...$59.90 -
Alloy Top Front Plate - Compatible w/ ARRMA 6S
GPM
MSRP: $12.90$10.29Function & Usage Front aluminum top plate designed to mount the upper suspension arms, steering posts, and front chassis brace while tying the front steering and gearbox assembly together for...MSRP: $12.90$10.29 -
Suspension Link Stabilizer - Compatible w/ ARRMA (1/7-1/8th scale)
GPM
$11.90Function & UsageMounts to the top of the rear gearbox to stabilize the rear suspension links and firmly support the rear wing, improving rear-end rigidity and balance during high-speed runs and...$11.90