housing tci & classic industry states only support 18 up to 23 teeth 7/8 diameter. On amazon i see a 24 count that claims it fits into the same 7/8 housing. i think i should wait and try the 23 teeth count as the 24 might break off or damage something? my hope is the 23 count will knock out some of the remaining 5mph that the car is reading fast .
