321 Estremo X Line DLC Ceramic 25% 1/8th Buggy Engine

The 321 ESTREMO™ is the first engine of REDS Racing’s new X Line, combining Italian engineering with Japanese precision from O.S. Engines. This 3-port engine delivers exceptional torque and instant throttle response, ideal for technical tracks and big jumps. The cylinder design and ultra-lightweight piston optimize air-fuel mixture flow, maximizing overall power output. The AirBoost™ backplate and 21J carburetor with Venturi XFlow™ ensure easy tuning, improved efficiency, and consistent performance on every track.
Manufactured in Japan and assembled by Mario and Marco Rossi, the 321 ESTREMO™ represents the perfect fusion of Italian racing passion and Japanese craftsmanship.

Technical Info

• Category: 1/8 Buggy and Truggy
• Displacement: 3.5 cm³
  
• Bore x Stroke: 16.4 × 16.4 mm
  
• Ports: 3 intake, 1 exhaust
  
• Front Bearing: 7×19×6 with high-performance seal
  
• Rear Bearing: 14×25.4×6 – 9-ball high-durability ceramic bearing
  
• Carburetor: OS 21J with Venturi XFlow
  
• Venturi Diameter: 7 mm (optional: 6 mm or 8 mm – body 9 mm)
  
• Backplate: AirBoost™ DLC-coated
  
• Crankshaft: DLC-coated with two tungsten balancing weights
  
• Weight: 345 g
  
• Recommended Fuel: 16–30% nitro with 8–10% oil
  
• Glow Plug: REDS TS3 or TS4
  
• Exhaust System: 2143 X-ONE X Line
  
• Clutch: REDS TETRA-X