Helix now offers many sizes of pulleys, in both clamp on and press fit styles starting (complete) at $100. If you are still a pulley virgin, and want to take the plunge, or if you already have a hub on your shaft (so to speak), we can provide you with the latest pulley technology. We offer 17% and 19% pulleys for those who already have the hub on their car for $80. For more info, see our website at http://www.helix13.com or give us a call at 215 739 8800.