Speedometer Driven Gear Kit (17-18-19-20-21-22-23 Teeth) For GM TH350 Turbo 350
Fit For GM TH350 (Turbo 350)(17-23Teeth). OEM Part Number: 3987918 (18 Teeth), 3987919(19 Teeth), 3987920(20 Teeth), 3987921(21 Teeth), 3987922(22 Teeth). 1 x 17 Tooth Speedo Driven Gear （With O-ring oil seal）.