FZCSZ643

Overview

The FONZON 43T Full Metal Split Centre Diff is a premium upgrade component designed for serious RC enthusiasts running the ARRMA 6S platform. Whether you're a competitive racer, a weekend basher, or an RC car UK hobbyist looking to maximise drivetrain performance, this centre differential delivers the precision engineering and durability required for extreme conditions. Built to exacting standards with premium materials and CNC machining, this is the ultimate upgrade for users who demand bulletproof reliability and smooth power distribution across challenging terrain.

Engineered for performance and built for durability, the FONZON Center Differential is the ideal choice for ARRMA 6S rigs including the Kraton, Outcast, Notorious, Talion, Mojave, Infraction, Felony, Fireteam, and Typhon platforms. The 43T gear ratio is specifically designed for extreme high-speed setups, significantly increasing the final drive ratio to suit users with clear high-speed modification needs. This component is recommended for experienced tuners pairing it with medium to small tyres and high KV motors, along with ESC temperature protection to prevent overheating during intensive sessions.

This is not a ready to run RC car, but rather a specialist drivetrain component for those upgrading existing ARRMA 6S vehicles. It arrives pre-filled with 100K cSt differential oil and ready to install straight from the box, eliminating the need for additional setup or oil purchases. The combination of full metal construction, premium materials, and factory precision assembly means you're investing in a component that will handle the demands of high-performance RC driving.

Key Features

• Fully CNC-machined nickel-chromium alloy steel gears — The drivetrain gears are precisely machined from premium nickel-chromium alloy steel (4340 steel makeup), delivering superior strength and exceptional wear resistance even under the most demanding high-speed and high-load conditions that push standard differentials to their limits.
• 7075-T6 aluminium centre housing — The differential housing is constructed from aerospace-grade 7075-T6 aluminium alloy, providing lightweight rigidity without sacrificing strength, whilst the finely polished finish delivers a professional appearance that reflects the quality of the engineering within.
• Extended nickel-chromium steel drive cups — The +1.5mm extended nickel-chromium steel drive cups are specifically optimised to reduce drivetrain angle stress, which translates to longer component lifespan and more consistent performance during aggressive driving and rapid directional changes.
• Grade 12.9 titanium-coated screws — Every fastener is grade 12.9 titanium-coated in a corrosion-resistant gold finish, ensuring that even the smallest components are built to last and won't corrode or fail during wet conditions or extended outdoor use typical of UK RC bashing.
• Sealed high-performance adapter cup bearings — Premium sealed bearings ensure smooth, efficient rotation with minimal friction, meaning the differential spins freely for optimal power delivery and responsiveness during acceleration and cornering.
• Pre-filled with 100K cSt differential oil — The component arrives filled with professional-grade differential oil at the correct viscosity, so it's ready to run straight out of the box without requiring additional purchases or time-consuming assembly and priming steps.
• LSD clutch plate set included — The Limited Slip Differential clutch plate set is included as standard, allowing experienced tuners to optimise traction control and handling characteristics to match their driving style and local track or terrain conditions.
• 43T gear ratio for extreme high-speed setups — The 43T ratio significantly increases the final drive ratio, making this component ideal for users with dedicated high-speed modification needs who are running low-profile tyres and maximised motor power outputs.
• Universal ARRMA 6S platform compatibility — This centre differential is engineered for direct fit installation across the entire ARRMA 6S family, including Kraton, Outcast, Notorious, Talion, Mojave, Infraction, Felony, Fireteam, and Typhon platforms, making it a versatile upgrade for multi-vehicle operators.

Technical Performance

The FONZON 43T Full Metal Split Centre Diff represents professional-grade drivetrain engineering optimised for extreme performance applications. Every component is CNC-machined to precise tolerances from premium materials: the gears are crafted from nickel-chromium alloy steel (4340), the housing from 7075-T6 aerospace-grade aluminium, and all fasteners are grade 12.9 titanium-coated for absolute durability and corrosion resistance. The +1.5mm extended drive cups reduce angular stress throughout the drivetrain, extending component lifespan and maintaining consistent performance during rapid acceleration, aggressive cornering, and sustained high-speed runs. The sealed high-performance adapter cup bearings minimise friction and resistance, ensuring smooth, efficient power delivery. With a 43T gear ratio, this differential is specifically engineered for extreme high-speed setups and is best paired with medium to small tyres, high KV motors, and ESC temperature protection to manage the increased thermal demands. The unit arrives pre-filled with professional-grade 100K cSt differential oil, and the included LSD clutch plate set provides experienced tuners with fine-tuning options to optimise traction control and handling across different surfaces and driving conditions.

What's in the Box

• FONZON 43T Full Metal Split Centre Differential assembly
• Pre-filled with 100K cSt differential oil
• LSD (Limited Slip Differential) clutch plate set for optional tuning

What You Need to Complete

• Compatible ARRMA 6S platform vehicle (Kraton 6S, Outcast 6S, Notorious 6S, Talion 6S, Mojave 6S, Infraction 6S, Felony 6S, Fireteam 6S, or Typhon 6S)
• Basic RC tools for installation and adjustment

Frequently Asked Questions

• Is the FONZON 43T centre differential suitable for beginners? — This component is specifically designed for experienced RC tuners and serious enthusiasts rather than beginners. The 43T ratio is engineered for extreme high-speed setups, and installation requires mechanical knowledge and proper tools. Novice users should start with stock or entry-level differentials before upgrading to this premium component.
• What ARRMA 6S models is this centre differential compatible with? — The FONZON 43T is engineered as a direct fit for all ARRMA 6S platforms, including the Kraton 6S, Outcast 6S, Notorious 6S, Talion 6S, Mojave 6S, Infraction 6S, Felony 6S, Fireteam 6S, and Typhon 6S. Always consult your vehicle manual and check exploded diagrams to ensure correct fitment before ordering.
• What makes the 43T ratio different from standard differentials? — The 43T gear ratio significantly increases the final drive ratio compared to factory differentials, making it suitable for extreme high-speed applications. It is specifically designed for users running medium to small tyres paired with high KV motors. This ratio demands proper motor cooling and ESC temperature protection to prevent overheating during extended use.
• Does this centre differential come ready to install? — Yes, the FONZON 43T arrives pre-filled with professional-grade 100K cSt differential oil and is factory precision-assembled, meaning it is ready to install directly into your ARRMA 6S vehicle without requiring additional oil, priming, or assembly steps. However, experienced tuners may wish to drain and refill with their preferred differential oil or adjust the included LSD clutch plates for optimal performance.
• What is the purpose of the included LSD clutch plate set? — The Limited Slip Differential clutch plates allow experienced tuners to fine-tune traction control and handling characteristics. By adjusting the number and tension of clutch plates, drivers can optimise the differential's locking behaviour to suit their specific driving style, local terrain conditions, and track requirements. This is an advanced tuning feature for users with solid RC knowledge.
• Why is this differential better than factory stock components? — The FONZON 43T utilises premium materials including CNC-machined nickel-chromium alloy steel gears, aerospace-grade 7075-T6 aluminium housing, extended drive cups, and grade 12.9 titanium-coated fasteners. These materials and the precision manufacturing process deliver superior strength, wear resistance, and durability compared to stock components, ensuring the differential can handle the extreme forces generated during high-speed running and aggressive terrain bashing.
• What tyres and motor setup should I use with the 43T ratio? — The manufacturer recommends pairing the 43T ratio with medium to small tyres combined with high KV motors for optimal results. This setup maximises the benefits of the increased gear ratio for high-speed applications. ESC temperature protection is essential to prevent motor and electronic component overheating during extended running sessions.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the FONZON 43T FULL METAL SPLIT CENTRE DIFF - ARRMA 6S SERIES FZCSZ643 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.