Team Associated RC10 Stealth – Masami Hirosaka 1991 IFMAR Worlds Replica

A Race Car, Not a Toy.

The Team Associated RC10 Stealth Car that claimed victory at the 1991 IFMAR 1/10 Scale Off-Road World Championship in Detroit, Michigan is one of the most iconic race-winning platforms in RC history. Driven by Masami Hirosaka, this legendary machine represents the peak of early-1990s electric off-road engineering and remains a benchmark for competitive RC design.

Championship-Winning Heritage

At the demanding Detroit Worlds, Masami showcased absolute control, precision, and consistency, piloting the RC10 Stealth to a dominant performance on the challenging clay surface. The car’s advanced layout, meticulous setup, and Masami’s unmatched driving skill combined to deliver a historic victory that further cemented Team Associated’s dominance on the world stage.

The 1991 Worlds win did more than add another title—it influenced the future of off-road RC design. Many of the concepts proven on this platform shaped generations of race buggies that followed.

Engineering That Changed RC Racing

The RC10 Stealth was a major evolution of the RC10 platform, introducing innovations that pushed performance forward:

• Double-deck chassis design for improved rigidity and balanced weight distribution

• Low-profile Stealth® transmission delivering smoother power transfer, improved efficiency, and exceptional durability

• Integrated motor/heat sink protection to manage heat during intense racing

• Race-tuned suspension geometry for superior grip, stability, and corner speed

A fully independent long-arm suspension with hard-anodized coil-over shocks allowed precise tuning for any track condition. Adjustable camber links and A-arm/ball-joint architecture provided racers with full control over camber, camber gain, caster, ride height, and spring rates—true race-bred adjustability.

Collector-Grade 1991 Worlds Replica

This kit faithfully recreates the legendary 1991 RC10 Stealth, blending period-correct details with premium materials. It is designed for collectors, vintage racing enthusiasts, and builders who appreciate RC history as much as performance.

Key Features

• CNC machined aluminum chassis with laser-etched chassis logo

• Carbon fiber top plate

• Stealth® transmission

• CNC chassis standoffs

• Hard anodized shock bodies

• Black anodized shock caps

• Ball bearings throughout

• Titanium turnbuckles

• 1991 Stealth® car front bulkhead

• 1991 Stealth® car rear arm mounts

• Stealth® car wide front suspension arms

• 1991 Stealth® car rear suspension arms

• Legendary 1991 front shock tower geometry

• Long-stroke shock springs (1991 Stealth® spec)

• Copper shock springs (1991 Stealth® spec)

• Silver motor bracket (1991 Stealth® spec)

• Rear dogbones included

• Replica Masami battery strap and ESC mount

• 1991 World Championship replica tires

• Pink wheel dot decals (rear wheels are black)

• Clear lexan undertray

• 1991 Stealth® car front bumper

The Masami Hirosaka Legacy

Masami Hirosaka is widely regarded as the most successful RC racer of all time. With an unmatched 14 IFMAR World Championship titles across multiple classes and more than 50 Japanese National Championships, his achievements set a standard that remains unequaled. Known for his smooth driving style and deep technical understanding, Masami played a major role in advancing RC car performance and setup philosophy worldwide.

The 1991 Detroit Worlds victory stands as one of the defining moments of his career and of RC racing history itself.

Vehicle Specifications

• Power Source: Electric

• Terrain: Off-Road

• Body Style: Buggy

• Scale: 1:10

• Drive: 2WD

• Assembly Level: Kit (assembly required)

• Product Status: Active

• Expected Availability: Early January 2026

Dimensions

• Length: 381mm (15.0in)

• Width: 226.8mm (8.93in)

• Wheelbase: 267.7mm (10.54in), adjustable

• Weight: Varies

• Internal Gear Ratio: 2.25:1

A True Piece of RC Racing History

The RC10 Stealth 1991 Worlds Replica is more than a model—it is a celebration of innovation, championship success, and one of the greatest drivers the sport has ever known. Whether displayed, built as a vintage racer, or enjoyed as a premium kit experience, this car represents a defining chapter in RC racing heritage.

Relive the moment. Build the legend. Celebrate Masami Hirosaka’s unforgettable 1991 World Championship victory.

Frequently Asked Questions – Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit

1) What is the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit is a 1:10 scale electric 2WD off-road buggy kit celebrating Masami Hirosaka’s 1991 IFMAR Worlds victory with the iconic RC10 Stealth platform.

2) Is the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit a toy or a race car?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit is designed as a race-inspired platform—“a race car, not a toy”—built around period-correct championship-winning engineering and tuning capability.

3) What scale and drive type is the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit is a 1:10 scale buggy with 2WD (two-wheel drive).

4) Does the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit come assembled?

No. The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit is an assembly-required kit and must be fully assembled by the user. Refer to “Required to Complete” items to finish the build.

5) What makes the Stealth® transmission important on the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit includes the low-profile Stealth® transmission, designed for smoother power delivery, improved efficiency, and enhanced durability, with the slipper protected by an integrated motor/heat sink.

6) What chassis and upper structure does the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit use?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit features a CNC machined aluminum chassis with a laser-etched chassis logo, paired with a carbon fiber top plate for a premium, race-focused structure.

7) What suspension tuning adjustments are possible on the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit?

The A-arm/ball joint design on the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit permits tuning of static camber, camber rise, caster, ride height, and spring rate to suit different track types and driving styles.

8) What shocks are included with the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit includes hard anodized shock bodies, black anodized shock caps, and 1991-spec spring options including long-stroke shock springs and copper shock springs for race-tuned feel.

9) What 1991 replica / period-correct parts are included with the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit includes 1991 Stealth® car components such as the ’91 front bulkhead, ’91 rear arm mounts, wide front suspension arms, ’91 rear suspension arms, world championship replica tires, a replica Masami battery strap and ESC mount, a clear lexan under tray, and period-style decals including pink wheel dot decals (rear wheels are black).

10) What are the dimensions and gear ratio of the Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit?

The Team Associated RC10 Stealth 1991 Worlds Masami Hirosaka 1/10 Buggy Kit measures 381mm (15in) long and 226.8mm (8.93in) wide, with an adjustable 267.7mm (10.54in) wheelbase. Internal gear ratio is 2.25:1, and weight varies depending on final build components.