Hamburger's coil brackets are sold in pairs, and include stainless steel hex socket fasteners for clean, secure mounting. The brackets have the same bolt pattern as a set of stock LS1/LS6 brackets, but have been designed primarily for use with Hamburger’s Performance Products’ Center Bolt Fabricated Aluminum Valve Covers (polished/brushed) on modified engines and race vehicles. Although these billet brackets use the same bolt pattern, their larger profile MAY interfere with your vehicle’s stock components. So, if you are thinking about using these brackets with your factory set-up, it is recommended that you check clearance carefully before ordering a pair.