These lower pulleys are compatible with ATI part number 917315 for the C7 LT5 damper. They are machined from 6061 aluminum and anodized for protection.
Each pulley includes six titanium T45 flat head screws for securing to the ATI damper.
The pulley is available as a 230mm (9.06") which is a 12% overdrive compared to the factory lower. The factory serpentine belt tensioner pulley will interfere with oversized supercharger pulleys. An optional clearanced 6061 pulley is available as an add-on and is recommended over trying to shave down the factory plastic pulley.