G Force Honda B Series - 4th Gear Smooth Bore M/S 1.09 - 25/23

G-Force B-Series 4th Gear Smooth Bore Main Shaft (1.09 Ratio – 25/23) – Enhanced Top-End Performance and Strength Upgrade your B-Series transmission with a 4th gear main shaft designed to deliver stronger acceleration in the upper gears while maintaining precision and durability. Featuring a smooth bore design, this gear is built for accurate fitment and reliable performance under sustained load. Key Features: 1.09 gear ratio (25/23) for improved top-end acceleration Smooth bore design for precise integration in performance builds Increased strength over OEM 4th gear components Built to handle sustained high-RPM and high-speed operation Ideal for drifting, road racing, and performance street use Details: Compatible with Honda B-Series transmissions Main shaft (M/S) configuration Designed to integrate with G-Force upgraded gear sets Precision-machined for consistent engagement and durability Sold individually for custom transmission builds Professional installation recommended Why Choose G-Force: As speeds climb, consistency becomes critical. G-Force main shaft gears are engineered to deliver reliable performance and durability under sustained load—so your drivetrain performs when it matters most. GFH1024