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An offset (eccentric) camshaft sprocket dowel for Ford Kent and Lotus Twin Cam engines. It takes the place of the standard locating dowel and moves the sprocket by a set number of degrees, so you can advance or retard cam timing without fitting an adjustable vernier sprocket. Choose the offset you need, from 1 to 9 degrees.
Check your sprocket: some sprockets have been opened up to a 0.437 in. hole to take an offset bushing instead. Those need a bushing, not this dowel.
Degree the cam with a degree wheel and dial gauge and compare the result against the cam card. Each dowel moves timing by exactly its stated amount, so pick the one that matches the correction you need. Check which way round the dowel sits before final assembly: fitted the wrong way, it moves timing in the opposite direction.
Ford Crossflow and Pre-Crossflow OHV Kent, and the Lotus Twin Cam 8v 1558cc. That covers Formula Ford 1600 and vintage Formula Ford engines, plus period road cars: Ford Cortina, Escort, Capri and Anglia; Lotus Cortina, Elan and Europa; Caterham 7, Morgan 4/4 and TVR 1600M.
Need the standard zero-offset dowel? Order FP607.