its a safe bet that most shops wouldnt know a upgraded pulley if it fell on their foot. as for the ecu tune and i/c unit without star das and visually seeing the i/c they would never know. putting a cai is an obvious mod and the s/a or tech would prolly see it.
if the warrenty was transferred from the previous owner the mods were most likly installed post warrenty and the shops never saw them