Here we have a new vernier Duplex Crank and Camshaft sprocket Kit
The kit contains
Duplex Crank Sprocket, Duplex Cam Sprocket, duplex timing chain,
Perfect for quickly dialing in a camshaft. Great for advancing or retarding the timing to move your powerband op or down the RPM range.
These will fit all MGA’s and MGB’s from 1965-1980 (except Twin Cam MGA’s)
This Duplex timing chain set up was used in all early MGB Engines, but can be used on any MGB engine. 3 or 5 Bearing