These lower pulleys are compatible with ATI part number 917315 (this is the C7 LT4 damper) for the C7 dry sump LTx engine. They are machined from 6061 aluminum.
Six titanium T45 flat head screws are available as an option for securing to the ATI damper.
The pulleys are available in any size as 8-rib for the standard LT4 belt drive up to an effective diameter of about 10.5" (we have not verified any specific sizes, so order at your own risk). These are made 100% in house. Anodizing is available for an extra fee (and may add significant time to delivery). Please specify the size of the pulley in the notes when placing your order. We can typically ship within one week of ordering (usually faster).