MRP 7a/4a Crank Sprocket Timing Modification
This modification is needed when installing a 4age head onto a 7a bottom end to effectively make a 7ag.
Without this modification the timing of the crank to the cams will be out approx 10 deg, therefore not ideal for performance.
Our Crank sprocket modification brings the timing back to where it should be.
7ag conversions will need to be using the 4ag oil pump and timing setup.
People in the past have used cam gears, but this will mean the cam gear markings are always offset.
20v conversions can’t use cam gears unless you loose the VVT function. Cam gears of course will cost more.
Brand new OEM Sprocket with Re Cut Keyway