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...nd 3K/4K/5K motors. They are the most common gearbox in early KE Corollas. TRD gearsets were available for K50 gearboxes. ...You can still purchase close ratio gearsets for the T50 gearboxes through TRD and also Quaife. The T40 or T50 gearbox can be adapted to a K series motor

[[Tech:Engine/K-Series/TRD Uprite Kit|TRD Upright Kit]] [[Tech:Engine/K-Series/TRD|How to build a TRD spec Upright motor!]]