steel chain rubbing on plastic chains/tensioners//// STUPID ASS DESIGN. Why couldnt they have used metal sprockets on needle/roller bearings instead? think about it.. steel on plastic. Recipe for disaster. Ad the thermal cycling of the plastic, and what dont get eaten up by the chain rub will get brittle and crack. I'll stay with 318/360, thanks. The 2.7s came out before these ever did/ I would have thought they learned their lesson on those turds.