Word of warning for you peeps, if you have the piper 3 bolt verniers, CHECK THE BOLTS EVERYDAY!!! I checked mine every other and they slipped when the car was at MSD for a setup (no damage thank god) and then slipped the other day and I snapped a valve and scrapped the head

And in Stu's own words, it was down to 'cheap ungraded steel bolts in the pulleys'
Stu put proper bolts in, I put loctite on them and they still slipped!!

Dont even know why they were fitted anyway, its got std cams!!