This Ring (crown wheel) and Pinion set that is for MGA, MGB Banjo axle (1962 to 1967), with a better ratio of 3.70:1 for driving. No machining will needed to install this is a standard MGB Banjo Axles assembly. Made in Germany for a perfect fit, 100% redesigned to bolt right in the banjo axle assembly correctly. Cross Reference BTB653
