521 GTS GEN3

REDS Racing is proud to introduce the new 521 GTS GEN3,designed to push performance and reliability to the next level.

Unleash the Power of Precision

Engineered for 1/8 GT competition, the 521 GTS GEN3 brings major innovations in cooling, efficiency, and power delivery. Whether you're battling it out on the track or fine-tuning for optimal lap times, this engine delivers superior performance, durability, and torque.

Features

• New Cooling Head – Improved heat dissipation for more consistent performance in long runs.
• Optimized Cylinder and Piston – Enhanced efficiency and power output, ensuring smoother acceleration and increased top speed.
• Increased Low-End Torque – The new design enhances torque at low RPM, providing better throttle response and improved drivability on technical sections.
• Refined Timing and Porting of 5 Port Sleeve – Engineered for maximum fuel efficiency and ultra-smooth power delivery, ensuring a seamless and responsive driving experience. The high-torque design enhances acceleration and power output, providing a significant advantage in competitive racing.
• High Reliability and Tuning Stability – Improved materials and manufacturing techniques ensure exceptional durability.
• Exceptional Fuel Mileage – Achieves better fuel efficiency compared to any other engine in its class.
• Carburetor & Venturi – The biggest improvement is the brand-new CG3 Carburetor, made from aluminum pressure die casting. This redesigned 3-needle carburetor ensures easier tuning in all conditions. Thanks to its mid-range needle, it delivers more linear power and increased overall performance. The CG3 is specifically designed to fit the INS BOX homologated by EFRA and IFMAR. To enhance product quality, a brand-new die-casting tool has been developed. Additionally, the New Venturi XFlow™ is available as an optional upgrade, offering improved airflow and enhanced performance for both on-road and off-road applications.
• Manifolds and Pipes – Specifically recommended to use with REDS All-New EFRA 2206 pipe and GT DualBend™ header or GT Conical S Header

MA210003 PIPE REDS 3.5CC EFRA 2206

CL210006 MANIFOLD REDS 3.5CC GT Conical S

CL210009 MANIFOLD REDS 3.5CC GT DualBend™

• Enhanced Clutch Compatibility – When paired with the TETRA GT 4-Shoe Adjustable Clutch, the engine maximizes performance, ensuring superior power transfer and responsiveness.

Technical Specifications

Why Choose the 521 GTS GEN3?

The 521 GTS GEN3 is the result of extensive testing and development to ensure peak performance, durability, and efficiency. Thanks to its increased low-end torque, this engine provides better control in tight corners and enhanced acceleration out of turns, making it the perfect choice for GT racing enthusiasts.

Upgrade your GT racing experience today!

Available Configurations

We developed 3 different combinations for this engine:

• 521 GTS with steel bearing
• 521 GTS with ceramic bearing
• 521 GTS Pro Tuned by Mario Rossi with ceramic bearings

You can order all of them with or without pre break-in service.