Traxxas Slash 4x4 Low-CG Chassis Conversion Kit TRX7421

Overview

The Traxxas Slash 4x4 Low-CG Conversion Kit (TRX7421) is a complete chassis upgrade system designed to transform your existing Slash 4x4 short-course truck into a high-performance racing machine. Performance-proven by Traxxas' award-winning Slash 4x4 Ultimate and 1/10 Rally models, this low centre-of-gravity chassis conversion is now available as a standalone kit for RC enthusiasts throughout the UK. Whether you're competing on an indoor racing circuit or bashing trails in your backyard, this conversion kit delivers superior handling characteristics and dramatically increased corner speed that will elevate your driving experience to the next level.

The Low-CG Conversion Kit represents a significant advancement in short-course truck design, bringing all the advantages of a low centre-of-gravity configuration to the already impressive Slash 4x4 platform. By lowering the chassis, battery and electronic components as far as possible within the vehicle's structure, this kit positions all weight low in the chassis for maximum stability during cornering and high-speed manoeuvres. The conversion is perfect for competitive racers seeking an immediate performance upgrade, weekend bashers looking to improve handling characteristics, or anyone exploring the world of RC cars in the UK who wants to unlock their truck's true potential. This is one of the most impactful tune-up options available for Slash 4x4 owners, with verified customer feedback confirming dramatic improvements in both handling and overall pace.

Installing the Low-CG conversion kit is straightforward, as Traxxas has engineered a complete system that includes absolutely every part and piece of hardware required to convert one standard Slash 4x4 to the optimised low-CG configuration. No hunting through spares catalogues or ordering additional components—everything you need arrives in one box, ready to transform your truck's performance characteristics.

Key Features

• Complete Conversion Kit — This is a fully comprehensive kit that includes every single component and fastener required to convert your Slash 4x4 to low-CG configuration, meaning no additional parts are required and installation can begin immediately upon receipt.
• One-Inch Chassis Lowering — The kit lowers the entire chassis structure by one full inch, dramatically reducing the overall height of the vehicle's centre of gravity and fundamentally improving handling characteristics at all speeds.
• Over 50% Battery Position Reduction — The battery mounting system positions the battery pack more than 50% lower than in standard configuration, ensuring that the heaviest component in your truck sits as low as possible for maximum stability and predictable handling.
• Integrated Ribs and Triangulated Structure — The chassis features reinforced integrated ribs that form a rigid triangulated structure, preventing flex under load during aggressive cornering, acceleration and braking, ensuring your truck maintains its shape and handling characteristics under all racing conditions.
• Ultra-Smooth Chassis Bottom — The underside of the chassis is finished ultra-smooth to reduce aerodynamic drag and prevent snagging on obstacles, whether you're charging through whoops on a racing surface or blazing trails across your backyard.
• Enhanced Corner Speed and Stability — The low-CG design dramatically increases corner speed and improves stability on all surfaces, allowing you to maintain higher velocities through technical sections and reducing overall lap times in competitive situations.
• Waterproof Receiver Box with O-Ring Seal — The kit includes a waterproof receiver box featuring an o-ring seal, providing electronics protection when you're driving in wet conditions or challenging weather, essential for UK drivers who frequently encounter rain and muddy terrain.
• Integrated Transponder Mount — A dedicated transponder mount is integrated into the chassis design, allowing you to install lap-timing equipment for competitive racing without additional modifications or bracket fabrication.
• Genuine Traxxas Quality and Precision — Every component in this kit is manufactured to Traxxas' exacting standards with precision engineering, ensuring perfect fitment, durability and long-term reliability in both competitive and recreational use.

Technical Performance

The Traxxas Slash 4x4 Low-CG Conversion Kit represents a significant engineering achievement in RC short-course truck design. The chassis structure itself is constructed with reinforced integrated ribs that create a rigid, triangulated framework, eliminating unwanted flex that would otherwise compromise handling precision under load. By lowering the centre of gravity one full inch and positioning the battery pack more than 50% lower than standard configuration, the kit fundamentally alters the vehicle's handling dynamics, making it significantly more stable during cornering while allowing higher corner speeds to be maintained consistently. The ultra-smooth underside finish reduces aerodynamic drag and prevents snagging on obstacles, a critical consideration whether you're racing on indoor astro tracks, outdoor carpet circuits, or off-road trails. The waterproof receiver box with o-ring seal protects your radio receiver from moisture ingress, an essential feature for UK drivers who regularly encounter wet conditions and muddy terrain. The kit includes a complete motor mount, motor plate, front and rear bulkheads, battery hold-down system with front and rear hold-down retainers, nerf bars for protection, steering linkage, servo horn, gear cover, wire retainers and a comprehensive installation hardware set. Customer feedback confirms that this conversion delivers transformational improvements in handling characteristics, with racers reporting immediate lap-time reductions and dramatically improved cornering speed, particularly beneficial for competitive indoor racing on astro surfaces where grip and stability determine competitive success.

What's in the Box

• Low-CG chassis main component
• Nerf bars (pair)
• Front bulkhead
• Rear bulkhead
• Motor mount
• Motor plate
• Battery hold-down system
• Front hold-down retainer
• Rear hold-down retainer
• Servo horn
• Steering linkage
• Waterproof receiver box with o-ring seal
• Gear cover
• Wire retainer
• Complete installation hardware set (all fasteners, bolts and brackets)

What You Need to Complete

• Battery pack (sold separately) — LiPo battery compatible with your Slash 4x4
• Electronic speed controller (sold separately) — if not already installed in your truck
• Receiver (sold separately) — if not already installed in your truck
• Servo (sold separately) — if upgrading from standard specification
• Motor (sold separately) — if upgrading from standard specification

Frequently Asked Questions

• Is the Slash 4x4 Low-CG Conversion Kit suitable for beginners? — The kit itself is designed for users with basic mechanical skills and RC knowledge, though you'll need either a pre-assembled Slash 4x4 to convert or comfort working with RC chassis assembly. The conversion process requires following Traxxas' detailed instructions carefully, and we recommend having experience with basic RC maintenance. However, once installed by someone with appropriate mechanical skills, the truck is absolutely suitable for drivers of all experience levels to enjoy and race.
• What is the difference between the Low-CG configuration and standard Slash 4x4? — The primary differences are that the Low-CG kit lowers the chassis by one full inch and positions the battery pack more than 50% lower, fundamentally altering the vehicle's centre of gravity. This results in dramatically improved corner speed, enhanced stability during aggressive driving, and significantly reduced lap times in competitive racing situations. The reinforced chassis structure with integrated ribs prevents unwanted flex, and the waterproof receiver box provides enhanced electronics protection in wet conditions. Many UK racers report that installing this kit was the single most impactful upgrade they made to their Slash 4x4.
• Which Slash 4x4 models is this conversion kit compatible with? — This kit is specifically designed for the Slash 4x4 platform and is compatible with all standard Slash VXL 1:10 4x4 short-course truck variants, including models in orange, red, blue and green colourways. The kit includes absolutely everything required to convert one standard Slash 4x4 to low-CG configuration, though your existing battery, receiver, speed controller and motor will need to be transferred to the new chassis.
• Does this kit include a battery and charger? — No, the battery is sold separately and not included in this conversion kit. Your existing battery from your current Slash 4x4 can be used, or you may choose to upgrade to a higher-quality LiPo battery for improved performance. Similarly, your existing receiver, speed controller and motor can be transferred to the new chassis unless you choose to upgrade any of these components.
• What performance improvements can I expect after installation? — Based on verified customer feedback, you can expect significantly improved corner speed, superior handling characteristics, enhanced stability during aggressive driving, reduced lap times in competitive racing, and improved predictability across all driving surfaces. Many UK racers who installed this conversion kit reported immediate lap-time improvements, particularly when racing indoors on astro surfaces where the improved stability provides a genuine competitive advantage.
• Is the Slash 4x4 Low-CG kit waterproof? — The kit includes a waterproof receiver box with o-ring seal, providing protection for your radio receiver in wet conditions and muddy terrain. However, the chassis and other components are not fully sealed, so you should avoid prolonged submersion or deep water crossings. The waterproof receiver box is ideal for UK drivers who frequently encounter rain, puddles and damp conditions.
• What tools will I need to install this conversion kit? — You'll need basic RC maintenance tools including hex key sets (both metric and imperial), screwdrivers (Phillips and flat-head), a small needle-nose pliers, and potentially a small wrench or socket set. Traxxas provides detailed installation instructions with the kit, and we recommend carefully following these before beginning your conversion project.

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 Traxxas Chassis conversion kit, low CG (Slash 4x4) TRX7421 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.