10x1.5mm Thread 5 speed Type-R Shift Knob in Red Billet Aluminum for Honda Civic CRX Si 88 89 90 91 1988 1989 1990 1991 VMS Racing Type-R Style 5 Speed Brand New, Never Used. Never Installed. Fit Most Honda/Acura Vehicles with Manual Transmission. Made to Manufacturer Standards for easy Installation. NO drilling or tapping required. Shift Knob is 10x1.5mm and Might Fit Other Brands of Vehicles with same thread and shift pattern. Unique, Locking Nut system. Made from one piece of solid Aircraft-Quality T-6061 Billet Aluminum and Precision-Machined for a firm, reliable feel against your palm that results into positive shifting.