Honda K Series Close Ratio Pro-Spec 3

The Honda K Series Close Ratio Pro-Spec 3 is a high-performance 6-speed transmission designed for turbo K-20 or K-24 engines. It features close ratio gearing for greater control over torque and RPM delivery, while providing top speeds of 130mph or higher. With a rated capacity of up to 700HP or 1000HP in certain applications, this transmission is an ideal choice for any performance-focused K series engine. The Pro-Spec 3 gearbox offers ratios of 1st-2.313, 2nd-1.650, 3rd-1.304, 4th-1.080, 5th-0.920 and 6th-0.807 for a tailored drive experience. This kit includes a custom main shaft and 4 custom main shaft gears, plus 6 counter shaft gears for superior performance. Perfect for HONDA/LOTUS conversions, this kit works best with a 4.058, 4.40, or 5.08 final drive.