Triumph TR3A TR4 TR4A TR250 TR6 Spitfire Burled Walnut Overdrive Comp Shift Knob, Installing an overdrive or upgrading your current overdrive switch. We have a beautiful American Black Burled Walnut shift knob with embedded switch which installs in place of your standard knob. Just like the factory works cars you will be able to activate the overdrive directly from the shift knob.
For competition Rallye installs on shift lever
Stock No NOB2424 5/16 x 18 thread
Each shift knob is unique
One off
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