The R40 is HPI's full competition "Pro" 1/10th scale nitro touring car designed primarily for the racetrack. It has proven its speed with two wins at the ROAR National Championships in 2003 and 2004 driven by HPI world team driver Atsushi Hara.

All of the option parts Atsushi uses on his R40 are now included in the latest R40 Hara Edition kit, giving serious racers the chance to drive a champion’s car. The chassis design and layout of the components have been revised for a lower center of gravity to improve performance and handling, ideally suited for high-level competition. By skillfully gathering many of the heavy items at the center of the car and lowering the center of gravity, the R40 Hara Edition has quicker reflexes than the standard R40. The result is a car that has proven it can win at the racetrack.

To lower the center of gravity and to reduce the overall weight, the R40 Hara Edition comes with woven graphite shock towers and upper deck. Our race-proven lightweight 2-speed transmission is now standard equipment, delivering quicker acceleration. The new transmission also has a wider range of gear ratios and finer pitch gears for improved efficiency. Lightweight hollow pulley shafts are also standard for further reduction of the weight of the car and drivetrain.

The steering servo is now located at the center of the chassis, making it possible to mount it in a lower position. The receiver battery location has been changed to reduce the overall weight of the car and increase chassis stiffness. The layout is now optimized for the small and lightweight AAA batteries that are popular with racers.

The R40 Hara Edition features an improved fuel tank that is designed to accommodate the new radio equipment layout. The new tank design has the same capacity as the standard fuel tank, but with a lower center of gravity when filled up. And, a shield has been added to the tank to protect the servo and receiver from overflowing fuel when refueling.

New machined aluminum threaded shocks, front one way, improved rear diff, aluminum hex hubs and, and, and…

Comprehensive Features List

• Chassis upgrades
  #73110 New R40 Hara Edition Upper Deck (Woven Graphite)
  New woven graphite upper deck repositions the electronic components for a lower center of gravity, increasing overall chassis performance.
  
  #73925 New R40 Hara Edition Chassis
  The new chassis works with the new upper deck to achieve optimum weight distribution. This also allows the receiver battery to be mounted directly to the chassis for a lower CG and quicker steering response.
  
  
• Graphite shock towers
  Shock towers machined from 3mm high quality woven graphite for strength and weight savings. Extra shock mounting holes and camber link positions are provided for extended tuning range.
  #73089 Front Shock Tower A (Woven Graphite)
  #73090 Rear Shock Tower A (Woven Graphite)
  
  
• Lightweight transmission parts
  #33401 R40 Lightweight 2 Speed Shaft
  
  #33402 R40 Lightweight Middle Shaft
  Lightweight 2 Speed Shaft and Lightweight Middle Shaft decrease drivetrain weight for quick acceleration.
  
  #87173 Lightweight 2 Speed Transmission Set (0.8M)
  Lightweight 2 Speed Transmission Set is lighter, which delivers increased acceleration and a reduction in the overall car weight for faster lap times. Also features a finer gear pitch for increased efficiency and quicker acceleration, and hard anodized alloy clutch bell gears for extended gear life. The gear ratios have also been revised for more punch and higher top speed.
  
  
• Steering upgrade
  #33403 R40 Steering Upgrade Set (Bearings)
  Bearing Set for extra smooth steering response.
  
  #75067 New R40 Hara Edition Aluminum Servo Mount
  Aluminum servo mount provides a rigid mount for the steering servo, increasing steering precision.
  
  
• Drive train upgrades
  #75026 Front One-Way Differential 36T
  Front One-Way Differential for quicker steering and acceleration.
  
  #33406 Diff Gear Set (R40 4 Bevel Gear)
  4 bevel gears make the car more stable under hard acceleration. The 4 bevel gear set-up also increases durability.
  
  #33407 Aluminum Hex Hub Clamp Type (6mm/4pcs.)
  Precision 6mm machined aluminum hex hubs to decrease hub deflection. Also prevents the drive pin from falling out during car maintenance.
  
  
• More options
  #72170 Threaded Aluminum Shock Set (45-56mm)
  Threaded Aluminum Shock Set for extra durability and finer tuning options.
  
  #87241 New R40 Hara Edition Fuel Tank
  New optimized fuel tank shape provides a lower center of gravity for improved handling, also includes an fuel overflow channel.
  
  #38202 Aluminum Antenna Holder (Purple Anodized)
  Purple anodized aluminum antenna holder for increased durability.