ARRMA Machined Shock Piston Tapered 8x1.3mm Hole Pair Z-ARA330843

• Product Type: Machined Shock Piston
• Brand: ARRMA
• Model Number: Z-ARA330843 / ARA330843
• EAN: 5052127047852
• Spare Part Category: Suspension Spares
• Quantity Included: 2 x Machined Shock Piston
• Piston Design: Tapered
• Hole Count: 8 holes
• Hole Diameter: 1.3mm each
• Material: POM (Polyoxymethylene)
• Material Properties: Low friction, high stiffness, excellent dimensional stability
• Damping Characteristics: Asymmetrical compression and extension damping
• Manufacturing: Precision machined for accurate fit
• Compatible with 1/8 KRATON 6S 4X4 RTR Brushless Speed Truck (ARA8608V6)
• Compatible with 1/8 KRATON 6S EXB 4X4 RTR Brushless Speed Truck (ARA8708V6)
• Compatible with 1/8 KRATON 6S EXB AVC 4X4 RTR Brushless Speed Truck, Black (ARA8708T1)
• Compatible with 1/7 LIMITLESS 120 8S AVC 4X4 RTR Speed Machine (ARA7816)

Overview

The ARRMA Machined Shock Piston, Tapered, 8x1.3mm Hole (2) Z-ARA330843 is a premium suspension component designed to elevate the performance and handling characteristics of your RC car or truck. These precision-engineered shock pistons are essential upgrades for enthusiasts looking to fine-tune their vehicle's damping behaviour, whether you're running a competitive 1/8 scale RC buggy or a high-performance RC monster truck. Built with advanced manufacturing techniques and premium materials, these shock pistons deliver the consistent performance and reliability that serious RC hobbyists demand from their suspension systems.

Whether you're a seasoned RC competitor, a weekend basher, or an enthusiast working to optimise your vehicle's setup, these machined shock pistons offer the advanced performance characteristics needed to improve your RC car's handling over varied terrain. The tapered design provides distinct compression and extension damping characteristics, allowing you to dial in precisely the feel and response you need from your suspension. Available now in the UK, these shock pistons are an excellent choice for anyone looking to upgrade their vehicle's performance without breaking the bank.

RC Model Shop stocks a comprehensive range of ARRMA suspension components and spares, making it easy to keep your RC vehicle in peak condition. These machined shock pistons are compatible with several ARRMA models including the 1/8 KRATON 6S 4X4 RTR brushless speed truck and the 1/7 LIMITLESS 120 8S AVC speed machine, offering genuine parts that guarantee compatibility and performance with your existing setup.

Key Features

• Precision Machined Construction — Each shock piston is manufactured to exact specifications using advanced machining techniques, ensuring an accurate fit within your shock body and eliminating the guesswork from suspension setup. This precision engineering translates directly into consistent, predictable damping performance that serious RC enthusiasts rely on.
• High-Quality POM Material — The shock pistons are crafted from POM (polyoxymethylene), a premium engineering plastic that offers low friction characteristics, exceptional stiffness and excellent dimensional stability. This material choice ensures that your suspension performs consistently lap after lap without degradation or wear-related performance changes, making these pistons a long-term investment in your RC car's performance.
• Tapered Piston Design — The tapered geometry of these shock pistons enables different compression and extension damping characteristics, giving you the ability to fine-tune your vehicle's suspension response for different driving conditions. This design allows for more nuanced handling adjustments compared to standard piston designs, appealing to tuners and competitors who demand maximum control over their vehicle's behaviour.
• Eight 1.3mm Diameter Holes — The eight precision-drilled holes, each measuring exactly 1.3mm in diameter, control the flow of shock fluid through the piston during compression and extension cycles. This specific hole configuration is engineered to work perfectly with ARRMA shock systems, delivering the exact damping curve that ARRMA engineers intended for optimal performance.
• Pack of Two — These shock pistons come in a convenient pack of two, providing you with a front and rear pair ready to install in your RC vehicle. This ensures your vehicle has matched suspension components front-to-rear, which is essential for balanced handling characteristics and consistent performance.

Technical Performance

The ARRMA Machined Shock Pistons represent a significant engineering achievement in small-scale RC suspension technology. Manufactured from high-grade POM material, these pistons deliver exceptional dimensional stability and low-friction performance that ensures your RC vehicle's suspension maintains consistent damping characteristics whether you're running a gentle practice session or pushing your machine to the limit on rough UK terrain. The precision machining process guarantees tolerances tight enough to fit perfectly within ARRMA shock bodies without any play or slop, which is critical for transmitting accurate damping feedback to your chassis and tyres. The tapered design is particularly significant—rather than employing a simple cylindrical piston, the taper geometry allows different surface areas to engage with the shock fluid during compression versus extension phases, creating asymmetrical damping that can be optimised for specific driving characteristics. With 8 holes of 1.3mm diameter drilled through the piston head, fluid can flow through at precisely controlled rates, and the skilled tuner can modify damping by adjusting shock oil weight or even by carefully drilling or sealing holes for custom tuning. These pistons are confirmed compatible with multiple ARRMA models including the 1/8 KRATON 6S 4X4 RTR brushless speed truck variants, the 1/8 KRATON 6S EXB 4X4 RTR brushless speed truck with extended body, and the 1/7 LIMITLESS 120 8S AVC 4X4 speed machine, ensuring your investment provides genuine performance improvement across compatible platforms.

What's in the Box

• 2 x Machined Shock Piston (Tapered, 8 x 1.3mm Hole)

Frequently Asked Questions

• What ARRMA models are compatible with these shock pistons? — These machined shock pistons are compatible with the 1/8 KRATON 6S 4X4 RTR brushless speed truck, the 1/8 KRATON 6S EXB 4X4 RTR brushless speed truck with extended body, the 1/8 KRATON 6S EXB AVC 4X4 RTR brushless speed truck with advanced vehicle control in black, and the 1/7 LIMITLESS 120 8S AVC 4X4 RTR speed machine. Always verify your specific model before ordering to ensure correct fitment.
• How do tapered shock pistons improve my RC car's performance? — The tapered design provides asymmetrical damping by creating different piston surface areas during compression versus extension phases of suspension movement. This allows your RC vehicle to respond differently when the suspension is being compressed (like hitting a bump) versus when it's extending (like after landing a jump), giving you finer control over handling characteristics and the ability to tune for specific driving styles or track conditions.
• What is POM material and why is it used in shock pistons? — POM (polyoxymethylene) is a premium engineering thermoplastic chosen for its combination of low friction, high stiffness and exceptional dimensional stability. These properties are essential in shock pistons because they ensure consistent performance throughout your vehicle's operational life, prevent unwanted wear that could change damping characteristics, and provide the precision fit needed within shock bodies for reliable operation.
• Can I upgrade my existing ARRMA shocks with these pistons? — Yes, these are replacement shock pistons designed for ARRMA vehicles. If your compatible ARRMA model is fitted with standard shock pistons, these machined versions will provide an upgrade in precision and performance. Simply remove your existing pistons and install these in their place; no other shock modifications are required.
• Why would I need two shock pistons? — RC vehicles require shock pistons in both the front and rear suspension to maintain balanced handling. These are supplied as a pair specifically so you can upgrade both ends of your vehicle's suspension simultaneously, ensuring your front and rear damping characteristics are equally optimised for consistent handling from one end of your car to the other.
• Are these shock pistons suitable for beginners? — While these shock pistons are suitable for any skill level, they represent a suspension upgrade rather than a beginner-focused product. If you're new to RC and your vehicle came with standard pistons that are working fine, you may not immediately notice the benefits of this upgrade. However, if you're ready to start tuning your suspension setup or if your stock pistons are worn, these precision machined versions will deliver noticeable performance improvements.

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 ARRMA Machined Shock Piston, Tapered, 8x1.3mm Hole (2) Z-ARA330843 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.

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