Developed for use with that light valve spring used on those engines, these are a reasonably healthy cam set.
Intake duration @.040 249 - Lift .374
Exhaust duration @.040 - 235 - Lift .342
I guess they could be called a stage II cam set for the Gen 1 engine as well
http://shop.yoshimura-jp.com/en/product/syousai.php?id=872
