Overview
Transform your TRX-4MT monster truck into the legendary BIGFOOT® No. 1, "The Original Monster Truck," with this authentic engine detail and trimming template from Traxxas. This 1/18 scale accessory is designed specifically for the TRX-4MT platform and includes a striking chrome engine detail that brings unparalleled realism to your RC model. Whether you're a dedicated Traxxas enthusiast, a collector of authentic monster truck replicas, or someone looking to upgrade your RC car UK setup with premium aftermarket components, this engine detail kit delivers the quality and accuracy you'd expect from a leading RC retailer in the United Kingdom.
The TRX9857 engine detail is part of the comprehensive BIGFOOT No. 1 conversion system, allowing you to completely rebrand your TRX-4MT F-150 or K10 monster truck with authentic graphics, structural components, and mechanical details that faithfully represent the most iconic monster truck in history. This is more than just a cosmetic upgrade—it's a commitment to authenticity and scale modelling excellence. The inclusion of a precision trimming template ensures that installation is straightforward, allowing even intermediate RC enthusiasts to achieve professional-looking results without guesswork or extensive modification experience.
At RC Model Shop, we stock genuine Traxxas products and understand that serious RC hobbyists demand authentic, high-quality components that maintain the structural integrity and visual appeal of their models. This engine detail accessory represents the kind of meticulous attention to detail that separates casual RC car ownership from dedicated scale modelling. Available now through our online store or at our physical location, the TRX9857 is in stock and ready to help you complete your BIGFOOT No. 1 transformation project.
Key Features
- Chrome Engine Detail — The polished chrome engine block provides an authentic, show-quality finish that instantly elevates the visual appeal of your TRX-4MT monster truck, catching light beautifully and creating that signature BIGFOOT look that enthusiasts recognise immediately.
- Precision Trimming Template Included — The included template removes the guesswork from installation, providing exact measurement and placement guidance so you can achieve professional-looking results without extensive trial and error or permanent modifications to your chassis.
- 1/18 Scale Compatibility — Engineered specifically for 1/18 scale TRX-4MT models, this engine detail maintains perfect proportional accuracy and fits seamlessly with other BIGFOOT conversion components, ensuring your entire build looks cohesive and authentic.
- Designed for #9812 Body — This component is optimised for use with the #9812 body, which is the dedicated BIGFOOT No. 1 conversion body for the TRX-4MT platform, guaranteeing fitment and alignment without modification or adapters.
- Part of Complete BIGFOOT System — This engine detail works in conjunction with other BIGFOOT conversion components including the front grille, tailgate panels, and LED lenses, allowing you to build an entirely authentic monster truck replica that rivals factory-built showroom displays.
- Authentic Monster Truck Replica Detailing — Whether you're into competitive scale modelling, display collections, or casual RC car UK hobbies, this BIGFOOT engine detail adds genuine showroom-quality authenticity to your TRX-4MT platform.
Technical Performance
The TRX9857 engine detail is manufactured from high-quality chrome-plated materials that provide both visual impact and durability. The chrome finish resists fading and discolouration under normal indoor and outdoor use, maintaining its lustrous appearance across multiple seasons of display or active use. The engineering of this component ensures perfect fitment with the TRX-4MT platform and the #9812 BIGFOOT conversion body, with tolerances matched to Traxxas's exacting manufacturing standards. The trimming template is precision-printed on durable material, withstanding multiple uses without tearing or degradation, making it an invaluable reference tool even after initial installation. This accessory is designed as a bolt-on component requiring no chassis modification, motor swaps, or ESC changes—simply remove your existing body, install the BIGFOOT conversion body, position the engine detail using the template as your guide, and secure according to the included instructions. The scale accuracy means this component maintains proper proportions relative to the rest of your TRX-4MT, ensuring visual harmony across the entire model.
What's in the Box
- Chrome engine detail assembly for 1/18 scale TRX-4MT
- Precision trimming template for accurate installation and alignment
- Mounting hardware and assembly components as specified by Traxxas
Frequently Asked Questions
- What exactly is the TRX9857 engine detail and what does it do? — The TRX9857 is a chrome-finished engine block detail designed to mount beneath the #9812 BIGFOOT No. 1 conversion body on your TRX-4MT monster truck. It's purely a cosmetic upgrade that adds authentic mechanical detailing without affecting performance, handling, or electronics. The chrome engine detail is what you'd see if you lifted the bonnet on a real BIGFOOT monster truck, scaled down to 1/18 size.
- Will this work with my TRX-4MT model? — The TRX9857 engine detail is compatible with all TRX-4MT models in both F-150 (blue and black) and K10 (red and black) variants. However, it requires the #9812 BIGFOOT No. 1 conversion body to function properly, as the detail is engineered specifically to fit beneath that body. If you have the standard TRX-4MT body, you'll need to purchase the full BIGFOOT conversion kit (part number 9844X) which includes this engine detail, a front grille, and the complete decal set.
- Is this difficult to install? — Installation is straightforward for intermediate RC enthusiasts. The inclusion of a precision trimming template removes much of the difficulty, as the template shows you exactly where components should be positioned. No soldering, electronics knowledge, or extensive modification is required. The engine detail is a bolt-on cosmetic upgrade that takes most users 15-30 minutes to install properly, depending on their familiarity with their TRX-4MT platform.
- What is included with the TRX9857? — You receive the chrome engine detail assembly itself and a precision-printed trimming template that guides installation. Mounting hardware is included according to Traxxas specifications. You do not receive the #9812 body itself—you need to purchase that separately if you don't already have it.
- Can I use this engine detail with other bodies or platforms? — No, the TRX9857 is engineered specifically for the #9812 BIGFOOT No. 1 body and the TRX-4MT platform. It is not compatible with standard TRX-4MT bodies, other Traxxas platforms, or third-party bodies designed for different RC chassis. The fitment and alignment are precise and optimised only for the BIGFOOT conversion system.
- Do I need to remove my motor or electronics to install this? — No, the engine detail mounts externally as a cosmetic component. Your motor, ESC, battery, and all running gear remain untouched and unchanged. This is purely a visual upgrade that doesn't interfere with mechanical systems or electronic components.
- Is the chrome finish durable? — Yes, Traxxas uses quality chrome plating that resists fading, tarnishing, and scratching under normal use. The finish is suitable for both display models and active bashers. If you intend to use your TRX-4MT in rough outdoor terrain, the engine detail may eventually show minor wear, but the chrome is formulated to remain visually attractive across multiple seasons of use.
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 Engine detail, 1:18 TRX-4MT Bigfoot No. 1/ trimming template (for #9812 body) TRX9857 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.
- Brand: Traxxas
- Model Number: TRX9857
- EAN: 020334039187
- Product Type: Engine Detail and Trimming Template
- Scale: 1/18 to 1/24 scale
- Finish: Chrome plated
- Designed For: TRX-4MT platform with #9812 BIGFOOT No. 1 conversion body
- Compatible Vehicles: TRX98044-1-BLUE (TRX-4MT F-150 Monster Truck Blue), TRX98064-1-BLK (TRX-4MT K10 Monster Truck Black), TRX98064-1-RED (TRX-4MT K10 Monster Truck Red), TRX98044-1-BLK (TRX-4MT F-150 Monster Truck Black)
- Included Components: Chrome engine detail assembly, precision trimming template, mounting hardware
- Installation Type: Bolt-on cosmetic upgrade, requires #9812 body
- Warranty: As per Traxxas standard warranty
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
