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OS Giken close-ratio gear kit for the Nissan 240SX SR20DET five-speed transmission is an internal gearset intended to tighten spacing between gears for more responsive shifts and closer RPM control during acceleration. Built for SR20DET-equipped 5-speed gearboxes, this close-ratio set is targeted at drivers seeking a more connected, track-oriented shift cadence without altering external driveline components.
OS Giken Nissan 240SX SR20DETTrans 5-Speed Close Ratio Gear Kit
