Word on the street is, they increase power. If they're the same as Delta's mild cams, they increase power from 1800-5800 RPMs.
I think you have DOHC tho, because of the AVLS or AVCS or whatever. But I think I've been wrong about that before on RS25, in which case I'm wondering where I picked up that misconception. Either way, check your manual is the moral of this story.
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