Water-cooling jacket for 3650/3660/3674 RC brushless motors Key benefits Prevents overheating: improves heat transfer away from the motor so it runs cooler under heavy load and for longer durations. Maintains performance and extends motor life: consistent cooling reduces thermal stress and wear on windings and bearings. Durable, long-lasting construction: made of high-quality aluminium alloy that is solid, wear-resistant, and environmentally friendly. What it does Designed specifically to fit 3650, 3660, and 3674 RC brushless motor sizes, providing a close, reliable fit with effective coolant contact. Acts as a water jacket to remove heat from the motor body, enhancing heat dissipation and reducing the risk of thermal shutdown or reduced efficiency. Finished with a novel appearance and exquisite workmanship for a precise, professional look. Key attributes Compatibility: Fits 3650/3660/3674 RC brushless motors. Material: High-quality aluminium alloy — solid, wear-resistant, durable, and environmentally friendly. Performance: Good heat dissipation for stable motor operation under sustained or high-power conditions. Design: Novel appearance and careful workmanship that complements performance with a tidy, engineered finish. Practical use scenarios High-speed RC boats: Keeps the motor temperature down during prolonged full-throttle runs, reducing the chance of overheating on extended water runs. Competitive RC car racing: Maintains consistent motor temperatures during heats and back-to-back races so power delivery remains stable. Endurance or high-load model applications: Useful for any RC model using 3650/3660/3674 brushless motors where extended runtime or heavy continuous load demands reliable thermal management. Why choose this jacket Specifically matched to common brushless motor sizes to ensure effective cooling. Robust aluminium construction balances strength, corrosion resistance, and thermal conductivity. Practical solution to motor overheating that helps protect your investment and preserves performance.