bullshit the type R will be no different. the shit only weighs 12 lbs. it will make a noticable difference. however i've used a clutchmasters 10lb in my single cam for probably half a year now w/ zero problems. so i can definitely vouch for them. as long as you get a flywheel from a reputable company and not one of those cheap ass ebay knock offs you shouldn't have anything to worry about.