RPM Rear Mud Guards for ARRMA Kraton Outcast 4S v2 BLX RC Truck RPM81962

Overview

The RPM Rear Mud Guards for 4S v2 ARRMA Kraton and Outcast are essential protective components designed to keep your RC monster truck and stunt truck running at peak performance. Whether you're a serious competitor bashing your brushless RC car around the UK or a weekend hobbyist enjoying high-speed runs, these mud guards provide crucial protection for your suspension and drivetrain. RPM has engineered these guards specifically for the 4S v2 versions of these popular ARRMA models, ensuring perfect fitment and reliable protection in all conditions.

If you own an ARRMA Kraton 4X4 4S v2 BLX Speed Monster Truck or an ARRMA Outcast 4X4 4S v2 BLX Stunt Truck, you know how demanding off-road RC driving can be. Mud, dirt, grass and debris get kicked up constantly during aggressive driving sessions, and without proper protection, this material accumulates on your rear suspension components, shocks, turnbuckles and driveshafts. This build-up not only looks unsightly but actually impairs performance and reduces the lifespan of your expensive RC parts. RPM's solution is elegantly simple yet highly effective: lightweight, rigid mud guards that act as a barrier between the debris and your critical drivetrain components.

What sets RPM Rear Mud Guards apart from the stock ARRMA alternatives is their commitment to quality, durability and the inclusion of mounting hardware. Unlike cheaper alternatives, RPM guards are engineered to last through countless bashing sessions whilst remaining incredibly lightweight. For any serious RC car enthusiast in the UK looking to protect their investment and maintain consistent performance, these are an absolute must-have upgrade.

Key Features

• Prevents Dirt and Mud Build-up — The primary function of these guards is to stop debris kicked up by your front wheels from accumulating on rear suspension components. By creating a physical barrier, they keep mud, dirt and grass off your rear shocks, turnbuckles and driveshafts, which means your suspension system stays cleaner and functions more predictably between cleaning sessions.
• Extends Component Lifespan — Keeping your suspension and drivetrain clean directly translates to longer service life for expensive components. Dirt and mud can cause increased friction, corrosion and wear on shocks, bearings and driveshaft seals. By preventing this accumulation, you'll enjoy longer intervals between rebuilds and fewer component failures during critical races or basking sessions.
• Improves Suspension Performance — Clean shocks and turnbuckles mean your suspension geometry remains consistent and predictable. Mud doesn't interfere with shock movement, and your carefully tuned suspension settings perform exactly as intended. This is especially important if you're running your RC monster truck or stunt truck at the track where precision matters.
• Extremely Lightweight Design — Weighing just 8.5 grams each (17 grams per pair), these guards add virtually no weight penalty to your RC truck. Minimal unsprung weight means your suspension can work more efficiently, your acceleration is uncompromised and your battery runtime isn't negatively affected. This is a performance upgrade that costs you almost nothing in terms of weight.
• Engineering Grade Nylon Construction — RPM has moulded these guards from their proven ultra-tough blend of engineering-grade nylons, the same materials used in their renowned A-arms. This means they're incredibly rigid, resist breaking under impact, and maintain their shape through countless bashing sessions. The material choice also means they're naturally flexible enough to handle minor impacts without shattering like cheaper plastic alternatives.
• Sold as a Pair with Hardware — You receive both left and right mud guards in one package, and critically, all necessary mounting hardware is included. This is a real advantage over stock ARRMA mud guards, which don't include mounting hardware. You can install these straight out of the box without hunting for additional parts.
• Compatibility with Multiple A-arm Options — These guards are designed to fit both stock ARRMA rear A-arms and the optional RPM Rear A-arms, giving you flexibility in how you build your truck. Whether you're running the factory setup or upgrading to RPM's enhanced A-arms for better hinge pin performance, these guards work seamlessly.
• Direct Replacement for Stock Parts — The RPM Rear Mud Guards directly replace stock ARRMA part number ARA311209, making installation straightforward. If you're upgrading from the factory guards, the mounting points are identical, so you can remove the old guards and install these new ones in minutes.

Technical Performance

RPM has applied the same engineering philosophy to these mud guards that makes their A-arms industry-leading. The guards are moulded from a carefully formulated blend of engineering-grade nylons that deliver the perfect balance between rigidity and impact resistance. Unlike brittle plastic guards that shatter under impacts or soft guards that deform and lose their protective shape, RPM's material composition maintains structural integrity through hard landings, obstacle strikes and the constant vibration of off-road RC driving. The uniform wall thickness throughout the guards ensures even stress distribution, which is critical for longevity. Each guard measures appropriately to cover the rear suspension area without interfering with suspension travel or shock extension. At just 8.5 grams per guard, the total weight penalty for the pair is negligible—approximately 0.3 ounces combined. This minimal weight addition means you won't see any reduction in acceleration, top speed or battery runtime on your ARRMA Kraton 4S v2 or Outcast 4S v2. The guards are shaped to direct debris away from critical components while remaining narrow enough not to catch or drag on obstacles. Installation is straightforward, with pre-designed mounting holes that align perfectly with both stock ARRMA rear A-arms (ARRMA part ARA330710) and RPM's enhanced Rear A-arms (RPM part 81792). The included mounting hardware is specifically selected for reliability, ensuring your guards stay in place even during the most aggressive driving sessions. RPM's commitment to quality means these aren't disposable parts—they're built to be part of your truck for the long haul.

What's in the Box

• RPM Rear Mud Guards (pair—left and right)
• Mounting hardware (complete set for installation)

Frequently Asked Questions

• Do RPM Rear Mud Guards come with mounting hardware? — Yes, unlike stock ARRMA mud guards, RPM includes all necessary mounting hardware in the package. This means you can install them immediately without hunting for additional screws or brackets.
• Will these mud guards fit my ARRMA Kraton or Outcast? — These guards are specifically designed for 4S v2 versions of the ARRMA Kraton 4X4 4S v2 BLX Speed Monster Truck and ARRMA Outcast 4X4 4S v2 BLX Stunt Truck. They fit both stock ARRMA rear A-arms and the optional RPM Rear A-arms, so as long as you have a 4S v2 model, you're good to go.
• How much do these guards weigh? — RPM Rear Mud Guards are incredibly lightweight, with each guard weighing just 8.5 grams. The complete pair weighs approximately 17 grams, adding virtually no weight penalty to your RC truck.
• Will these impact my truck's performance? — No. With such minimal weight addition, you won't notice any reduction in acceleration, top speed or battery runtime. In fact, by keeping your suspension cleaner and your shocks functioning optimally, these guards actually help maintain consistent performance throughout your driving sessions.
• Can I use these with upgraded A-arms? — Yes. The RPM Rear Mud Guards are designed to work with both stock ARRMA rear A-arms (part ARA330710) and RPM's enhanced Rear A-arms (part 81792). If you're upgrading your suspension, you can use these guards with either option.
• How do I install these mud guards? — Installation is straightforward. The guards feature pre-designed mounting holes that align with both stock and RPM A-arms. Simply position the guards and use the included mounting hardware to secure them. No special tools or expertise required—most users can complete installation in under ten minutes.
• Why should I use mud guards on my RC monster truck? — Mud guards prevent debris kicked up by your front wheels from accumulating on your rear shocks, turnbuckles and driveshafts. This keeps your suspension cleaner, maintains consistent performance, reduces wear on expensive components and extends service intervals between rebuilds. For anyone serious about their RC car UK hobby, they're essential.
• Are these better than stock ARRMA mud guards? — Yes, for several reasons. RPM guards include mounting hardware (stock ARRMA guards don't), they're made from proven engineering-grade nylon that's more durable than basic plastic, they're precision-engineered to fit perfectly, and they're backed by RPM's reputation for quality. They're a genuine upgrade worth the investment.

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 RPM REAR MUD GUARDS FOR 4S V2 ARRMA KRATON & OUTCAST RPM81962 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.