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Message: <blockquote data-quote="ess530i" data-source="post: 348667" data-attributes="member: 13496"><p>makes sense...but what about those JDM cars with in-line 4-cylinder engines? almost everyone who is into performance i know has lightweight pulleys and most have no harmonic balancers. even one of my fren who drives a wira had lightweight pulleys for 5 years without any major engine problem. they find our 'german' stories quite amusing... google for lightweight crank pulley and you will find the topic very debatable in the JDM world. even reputable aftermarket parts producer like perrin make and sell lightweight crank pulleys. perhaps thats where it makes a difference...just my thoughts</p></blockquote><p></p>