RS4 Sport 3
Featuring the Amazing and Thrilling
Hoonicorn RTR!

The full-size Hoonicorn RTR is the amazing car featured in Ken Block's Gymkhana SEVEN video that sent the motorsport fans into a frenzy - and now YOU can have a 1/10th scale version to drive yourself! Replicating the chopped, slammed and massaged look of the real 1965 Ford Mustang the Hoonicorn RTR is based on, the official HPI Racing replica version features the same gigantic supercharger air scoop, same paint scheme and even the same wheels as the real thing! With a high-traction full-time shaft 4WD providing the go power, this electric-powered version will let you pull off the same wild action as Ken Block himself - in 1/10th the size! 

There will only ever be one Hoonicorn RTR - but now YOU could be driving the official scale radio-control replica! 

The full-size Hoonicorn RTR is a totally custom, all-out drift machine that was designed by Formula Drift champion Vaughn Gittin Jr.'s RTR design studio and built by ASD Motorsports over 2 years to exacting specifications. It's fitted with a monstrous 410 cubic inch V8 putting out nearly 850 horsepower at a screaming 9000RPM. The engine is mated to a 6-speed Dakar Rally-spec transmission and 4WD drivetrain, with a completely custom adjustable suspension, and 3-piece fifteen52 wheels wrapped with super-wide 18-inch tires made in a custom compound just for Ken Block himself. You can read about the inspiration and design of the one-of-a-kind Hoonicorn RTR in this Speedhunters special article by Vaughn Gittin Jr!

fifteen52 R43 Replica 3 Piece Wheels

Custom-forged and machined by the custom wheel experts at fifteen52, the amazing 3-piece R43 wheels are replicated in exacting 1/10th scale directly from the original CAD files, so each and every Hoonicorn RTR replica has the perfect look and street stance. The real 18" x 10.5" wheels are made from machined forged 6061 aluminum centers and forged stepped & polished lips, while the replica is molded in high-impact nylon in a custom gold color. 

Replica Hoonicorn Tires

295/30/18 - magic numbers that give the technical side of Ken Block's full-size hoops that are fitted to all four corners of the Hoonicorn RTR. But numbers can't tell the whole story - especially when these tires are made in a custom compound especially for Ken Block himself! The replica tires look exactly like the real thing: extra-wide, semi-slick and super-cool! The scale tires are molded in a durable, long-wearing rubber compound that gives enough grip for awesome acceleration!

Official Replica of the Amazing, Custom 
Hoonicorn RTR

Taking the full-size Hoonicorn RTR with its handmade custom body and making it 1/10th scale was a major challenge for the HPI design team, but after months of hard work with scale drawings and hundreds of pictures of the real car, we're proud to call the 1/10th scale Hoonicorn RTR one of HPI's finest achievements. The replica wheels were even made with the help of the original fifteen52 CAD files to replicate their Ken Block special R43 wheels to complete the Hoonicorn's look, and each wheel is wrapped in a scale replica extra-wide semi-slick rubber tires. 

Play Gymkhana 7 video

Underneath all this detail and awesomeness is the RS4 Sport 3 chassis, the latest scale touring car chassis from HPI Racing! The HPI RS4 Sport 3 chassis features full-time 4WD, a completely sealed and highly efficient shaft drivetrain, coilover shock absorbers plus waterproof electronics. The fully contained drivetrain means there are no exposed gears, belts or drivetrain parts to get stuck with rocks or dirt. The car is completely assembled and fitted with the 1965 Ford Mustang Hoonicorn RTR body and fifteen52 wheels right out of the box, so all you have to do is PLUG IN AND DRIVE!

One-Piece Molded Chassis

The RS4 Sport 3 main chassis is formed from a single piece of reinforced plastic and features the drivetrain tunnel molded right down the middle, just like a real car. It's a step beyond any plastic tub chassis car available today.

Low Profile Layout Design

One of the ways we gave the RS4 Sport 3 the best possible handling was to make sure all the components fit as low as possible in the chassis. This gives the car an amazingly low center of gravity for enhanced cornering capabilities.

2S LiPo CAPABLE

The RS4 Sport 3 features a versatile electronic speed controller that can be used with modern lithium-polymer (LiPo) or nickel-metal hydride (NiMH) batteries. Please note a LiPo adapter plug is not included, your model shop will be able to provide one.

Fits a Wide Variety of Batteries

The RS4 Sport 3 chassis can fit lithium-polymer and nickel-cadmium packs of various sizes, including the extra-long 7-cell Ni-MH packs. Whatever your power requirements, it can hold it all! A thick hook-and-loop strap holds the pack securely in place, and a simple battery block screws into place to allow you to adjust the weight distribution forward or backward for extra steering or acceleration. 

Full-Time Four-Wheel Drive

The RS4 Sport 3 features full-time four-wheel drive to give you the most control and precision on the road or track. All four wheels are driven by heavy duty gear differentials at the front and rear, just like a real car. The extra traction gives you increased acceleration and cornering control for maximum confidence and fun. 

Sealed Shaft Drivetrain

The drivetrain of all the RS4 Sport 3 models features the motor mounted longitudinally in the molded chassis, next to the long driveshaft that goes down the center of the car. The entire drivetrain, including the central driveshaft and gear diffs, is completely sealed to prevent dirt, rocks and debris from damaging or binding the drivetrain. The driveshaft, diffs and axles spin on ball bearings to maximize drivetrain efficiency.

Bottom-Access Driveshaft

The central driveshaft that connects the front and rear differentials is easily accessed from underneath the chassis. This allows the drivetrain to be completely sealed to protect it from rocks and debris no matter where you may want to drive your car. 

Option: Carbon Fiber Driveshaft Cover 

You can easily replace the stock driveshaft cover on the bottom of the chassis with a carbon fiber cover that provides extra stiffness and extra-cool looks.

Easy Access Differentials

Getting to the differentials for quick adjustments is a matter of removing just 4 screws - this allows you to pop out the diff and change the grease, check the gears or just give it a general service. 

4-Gear Metal Diffs

Bevel gear differentials at each end of the car transfer power from the driveshaft to the dogbones and axles that drive each wheel. The all-metal construction allows the drivetrain to withstand powerful brushless motors for easy upgrading in the future. Rubber-sealed ball bearings support the differentials and each diff can be tuned independently by changing the diff grease. 

Option: Diff Spool 

The optional diff spool removes all diff action for direct traction and braking action from your trigger finger straight to the wheels.

Double-Wishbone Fully Adjustable Suspension

The suspension of the RS4 Sport 3 uses the race-proven double-wishbone suspension design, similar to a full scale modern race car. You’ll be able to control the anti-squat and anti-dive of the front and rear arms using the standard pivot blocks, and the option parts allow you to adjust the sweep and toe angles. You'll also be able to easily change the roll center front and rear with the racing-style vertical ballstud mounting on both the inner and outer camber link mounts. Multiple shock mounting positions provide a full range of shock suspension angle adjustment to suit different road conditions.

MULTIPLE SHOCK POSITIONS

Option: Carbon Fiber Shock Towers

The option pair of carbon fiber shock towers not only look amazing, but also adds extra stiffness to the suspension for optimal performance. The carbon fiber material is extra-lightweight which lowers the center of gravity on the RS4 Sport 3 as well.

Oil-Filled Threaded Shocks

The RS4 Sport 3 is fitted with a set composite coilover-style oil-filled shocks, just like what you'd see on a real race car. The fully adjustable shocks are fully tunable to provide the optimum chassis performance on a wide variety of road surfaces. The ride height is quickly adjustable by using the threaded shock collars. Further tuning adjustments are also possible by changing the springs and shock oil weight.

Option: Anodized Aluminum Threaded Shocks

For optimum performance, you'll want a set of anodized aluminum threaded shocks that are machined to perfection. The full anodized aluminum threaded shock body, aluminum shock collar, aluminum top and bottom caps will allow you to make the most precise tuning adjustments.

Tough Front End Suspension

The RS4 Sport front end uses the strong C-hub style suspension seen on the latest RC touring cars, with a vertical ball stud camber mount that lets you change the front end roll center – which is a critical racing adjustment that allows the RS4 Sport 3 to be a step above other sport-level RC touring cars. The suspension arm also features multiple shock mounting holes for easy shock angle adjustment.

Option: PRECISION MACHINED ANODIZED ALUMINUM FRONT PIVOT BLOCK

The optional set of front precision machined anodized aluminum pivot blocks provide optimum rigidity and suspension performance. The extra rigidity and durability also provides for a more stable and consistent base setup for additional tuning options.

Tunable Rear Suspension

The rear hub is fitted with a vertical ball stud style adjustment that allows easy adjustment of the rear roll center. Moving the ball stud up or down with the optional spacers changes the traction characteristics of the rear end as the car goes through the turns. The suspension arm also features 3 different shock mounting holes for easy shock angle adjustment.

Option: PRECISION MACHINED ANODIZED ALUMINUM REAR PIVOT BLOCK

The optional set of rear precision machined anodized aluminum pivot blocks provide optimum rear end suspension rigidity and performance. The extra rigidity and durability also provides for a more stable and consistent base setup for additional tuning options.

Option: CVD Driveshafts

The optional all in one CVD drive shafts greatly increases the precision and efficiency of the entire driveline and steering for maximum driving performance. 

Option: Adjustable Camber Link Turnbuckles

The option set of adjustable turnbuckles will allow you to quickly fine tune the camber setting of your RS4 Sport 3 for optimum performance.

Double Bellcrank Steering

The performance tested adjustable double bell crank system provides optimum steering precision at all speeds. A metal drag link plate connects the cranks for extra durability, the additional drag link mounting positions also allows for Ackermann angle adjustments.

Option: Anodized Aluminum Bellcrank Steering Set

For the ultimate steering performance, upgrade to the precision machined anodized aluminum bellcrank steering set. The included set of adjustable turnbuckles also allow you to change the front end toe angle to further fine tune your desired chassis steering performance.

Rugged Spring-Loaded Servo Saver 

The RS4 Sport 3 includes an adjustable multipiece cam-style servo saver, which protects the servo from crash damage. In the event of a crash or collision, the front wheels usually take a big portion of the blow and transmits the impact directly to the steering servo. The strong spring-loaded cam action of the servo saver is designed to absorb this force and protect the servo gears from the impact!

Aluminum Motor Mount

The cast aluminum cam-style motor mount holds the motor in place for a secure pinion/spur connection. Two screws hold the cam firmly in position on the mount, and cooling fins on the lateral support aid heat dissipation to keep the motor running as efficiently as possible.

Option: Machined Anodized Aluminum Motor Mount

The optional billet precision machined anodized aluminum motor mount will provide the most secure mount for your high powered competition motor.

Rear End Chassis Diffuser

The built in rear end chassis diffuser element smooths out the air flow underneath the chassis for maximum aero efficiency.

Rugged Front Bumper

To protect the front suspension, chassis and body from impacts big and small, an extra thick foam bumper is securely fastened to the front of the RS4 Sport 3.

Customize Your Look

A huge variety of option bodies, wheels and tires from HPI lets you fully customize the style of your RS4 Sport 3 to suit your style.

Adjustable Height Body Mounts

The adjustable height body mounts let you fit any 1/10th scale touring car body from HPI Racing on to the RS4 Sport 3 chassis. All you need to do is adjust the front and rear body mounts to allow the wheels and chassis elements to fit properly underneath the body. Body pins hold the mounts in place, and the multiple mounting hole positions allow you to fine-tune the exact body fitment.

Body Choices

You can fit any 1/10^th scale touring car body from HPI Racing onto the RS4 Sport 3, from hot hatches to supercars, pick-up trucks to supertouring racers. All you need to do is adjust the body mounts front and rear to allow the wheels to fit underneath the body properly. A simple system using body pins hold the mounts in place, and you can fine-tune the fit to get the exact ride height you want. 

Comprehensive Instruction Manual

All HPI Racing kits include a detailed multi-language instruction manual. Exploded diagrams and extensive information about your RS4 Sport 3 ensures that you have the knowhow when it comes to maintaining and upgrading your kit. You can also download  a digital version of the manual to your personal electronic device and keep it with you for easy reference on the go.

Download the Free RS4 Sport 3 poster Here!

Brighten up your RC workspace with a FREE poster featuring the RS4 Sport 3! Just click here to download it, then print it out or use it as your tablet or computer wallpaper!

MYhpi: The Ultimate Resource 
for Your RS4 Sport 3

Once you've got your RS4 Sport 3, add it to your MYhpi garage to get direct information about what will make your car faster, more adjustable and easier to tune. Add your entire HPI collection to your MYhpi garage so you can directly access manuals, videos, tips and help for each of your HPI cars!

EVERYTHING YOU NEED INCLUDED IN THE BOX - CLICK TO WATCH

Play unboxing video

#115990 RS4 SPORT 3 RTR 1965 FORD MUSTANG HOONICORN RTR

Specification may be subject to change