PERRIN shift knobs come in two different sizes. A Slim 1.6in Knob and a Fat 1.85in Knob for power shifters. The Fat Knob is approximately the same diameter as the OEM STI knob.

The PERRIN shift knobs height can be adjusted by as much as on 1 inch with the build in adjustment screw. Once the height is set, tighten the lock bolt and your knob will never loosen on it's own. Best of all, our super locking mechanism will not harm the threads of your shifter!Machined from billet aluminum, PERRIN shift knobs are light weight and balanced perfectly for your quick shifter. (small = 5.4oz & large = 6.8oz)Each PERRIN shift knob is carefully textured by hand and then anodized grey. The super hard surface from anodizing will maintain the finish of your knob for thousands of shifts.

The PERRIN shift knob works on both 5 speed and 6 speed transmission, fully clearing the reverse lock out function of 6 speed transmissions.

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