S ScottEk9 N.A King Joined Oct 27, 2006 Messages 275 Oct 23, 2021 #1 Is there any difference between the EK9 crank pulley and Ek9 N1 Crank pulley?
oifovo Well-Known Member Joined Jan 11, 2011 Messages 2,287 Oct 24, 2021 #2 The N1 pulley is lighter, it's not dampened and will only run PS pump not AC pump