I've recently purchased my 2nd 4.2 S/C - the first with 260,000miles on the clock had a reduction pulley and made a glorious whine when accelerating or climbing steep hills.

My new one is barely audible. Are they really this quiet with the standard pulley? 2006 L322 Vogue SE 4.2 S/C (no longer owned)
2008 L322 Vogue SE 4.2 S/C