Originally Posted by Dave07997S
The AFE is 4.124" in diameter, according to my calculations this makes it a 84.5 of the OEM diameter or a 15.5% reduction if my calculations are correct.
Great, thanks. Does this also mean you measured the OEM pulley at 124mm (4.88"). In the calculations for the AA pulley I used 122mm as the OEM size. I will use these figures for an update.