well the rk sport is an underdrive. so is the unothodox as well as the bomz ebay and obx versions...
mike (md ld9) has the pulley you want. unsure on if he has any left though. if not, your going to need to buy one off of someone. or you can hit up seller frankiesz on ebay, which has all the rsm/z spec remaining stock and does also have stock sized. ive been using one for a 3 years now without issue. but i will say mike's is of better quality as it is a lot tighter on the crank.
PFFT secret cams?! pm me if you want a real upgrade.
I'll be running a GP for the LD9 pulleys hopefully by the end of the month. With all the local machine shops going out of business. They are either working short weeks or to busy with rush orders to get back to me.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO