More Top-end speed compared to stock 10 tooth that come with most Torque Converters.
3/16 Key Way Cut
Description
12 Tooth C Sprocket. 5/8 Bore, used wih size 40,41 or 420 Drive Chain. Most torque converter kits come with a 10 Tooth. This 12 Tooth will give you a better gear ratio for more top end speed. After market replacement for Azusa 2199