WFO 3100-420. CNC machined billit aluminum shift knob with 4 speed shift pattern and reverse to the left and down. This knob has 3/8x24 threads, and comes with a thin stainless steel jamb nut. It most commonly fits Chevy SM420 transmissions, but It can also be used on other 4 speed transmissions with the same pattern. It is 1.750" in diameter, and 2.250" tall.
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