Pro-Tuned Power for On-Road Racing Excellence
This is the 521 GTS Pro Tuned Gen3 3.5cc (.21) On-Road Nitro Engine from REDS, a high-performance enginedesigned for serious racers who demand power, efficiency, and durability. Pro-tuned by Mario Rossi, thisengine is built for maximum throttle response, acceleration, and reliability in the most demanding on-roadconditions. Featuring a reinforced steel crankshaft, advanced cooling system, and precision-machinedinternals, the 521 GTS Pro Tuned Gen3 delivers consistent power and smooth handling, making it the ultimatechoice for competitive 1/8 on-road racing. Additionally this version oners a Pre Break-In by the worldrenowned Mario Rossi providing you with a top tier engine experience.
About the 521 GTS Pro Tuned
Precision-Tuned for Maximum Performance
The 521 GTS Pro Tuned Gen3 is meticulously crafted to provide superior durability and race-ready power. Itshigh-strength steel crankshaft minimizes wear and enhances longevity, while the optimized porting and fuelefficiency ensure extended run times without sacrificing performance. Equipped with performance ballbearings and an advanced cooling system, this engine is designed to withstand intense racing conditions,maintaining stability and responsiveness even in high-temperature environments.
Features:
- 3.5cc (.21) displacement for high-performance on-road racing
- Pro-tuned by Mario Rossi for peak competition-level performance
- High-strength steel crankshaft for superior durability
- Optimized porting design for smooth acceleration and throttle response
- Advanced cooling system for consistent performance in extreme conditions
- High fuel efficiency for longer run times
- Precision-machined internals for maximum reliability
- Performance ball bearings for reduced friction and improved efficiency
- Designed for 1/8 on-road racing applications
Includes:
- (1) 521 GTS Pro Tuned Gen3 3.5cc (.21) On Road Nitro Engine w/Pre Break-In by Mario Rossi
Specifications:
| Displacement | .21 cu.in (3.5cc) |
|---|---|
| Recommended Application | 1/8 On-Road |
| Bore | 0.64in (16.2mm) |
| Stroke | 0.67in (16.9mm) |
| Output | – |
| Intake Ports | 5 |
| Exhaust Ports | 1 |
| Practical RPM | – |
| Weight | 12.17oz (345g) |
This product was added to our catalog on March 3, 2025
Reviews
There are no reviews yet.