Extension end to end is 4.625" and on the gear box end uses the four 1/4" bolt mounting pattern that the gear box typically is drilled and tapped while the fuel pump extension end is the quick release clamp mount. Both ends of the extension are 2.120" female register.
Extension is made from billet alum. and anodized black. There are no bearings or shafts included with the extension.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.