well i ordered a 8 lb pulley hub not the ring, and i had a tune and dyno set up in memphis today at dyno speed. well i had truck on jackstands waiting on ups to show up. right on time ups truck pulls in. opened package and sure enough it was the ring instead of the pulley. that sucks. i will have to wait a couple more days and watch friends run their trucks at the track. i hate watching and for the first time i had a pair of slicks to try out.