RS Tuning .21 EVO4 Aluminium Liner Version, ready to race

RS-Tuned proudly presents the latest generation of its .21 racing engine: the RS Tuning .21 EVO4, based on the O.S. Speed Shimo3 platform and developed from experience gathered over three racing seasons.

Key features

• High-quality Swiss-made ceramic main bearing
• Hand-finished engine case
• Lightweight low-profile cooling head with polished finish and laser engraving
• New piston/liner generation designed to reduce scratching at the exhaust port
• Revised carburettor characteristics for easier tuning
• Nylon shims for adjusting header length
• Matched and pre-run piston and liner

RS-Tuned engines are supplied pre-run-in. A further careful running-in period of at least 20 minutes is recommended before full-load use.

RS-Tuned combines decades of RC engine experience with professional expertise in manufacturing high-quality engine components for full-size motorsport. The engines are individually prepared for demanding competition use.