I know people have asked before, and I've already tried doing searches, but what are ALL the internal components of the head and block in a Prelude Type S that are different from the USDM Preludes? I know they have different cams and pistons, a port and polish, and I thought I read the header too? But I'm wondering if the valves, valve springs, retainers, cam gears, rods, etc are different. My friend and I had an argument over what the differences were internally to gain the extra 20hp and I wasn't for sure which parts were different. He owns a GSR so I tried explaining that the differences were very similar to a Type Rs---he knows his way with Tegs...Somebody feed me info