This is a Genuine GM 3 speed Countergear . Tooth count 25-14-21. Fits 1958 Chevy Passenger cars 283 V8 (except overdrive), 1959-60 Chevy Passenger cars all. ( except overdrive), 1961 Passenger 283 1st. design ( except overdrive), 1961-63 Passenger 8 cyl. except 2nd design, 1961-63 Corvette. Group # 4.421 Part # 3741452.

Please Note:  NOS and USED parts are made by the OEM.  These parts can range from 10 to 75 years old and were made to the standards of the year the part was manufactured. Most NOS parts are in good to excellent condition unless otherwise stated, but please do not expect them to be perfect