The only known spark plug wire separators designed to replace the original 7mm wires, A BAD Innovations exclusive. The Ford factory original valve cover mounted spark plug wire separators were made for 7mm wires as are all reproductions on the market. While you can sometimes squeeze the newer 8mm wires onto the 7mm separators ours are designed for either 8mm or 8.5mm wires and fit like they should. Separators are made from Fiberglass infused Nylon and printed on a 3D printer. The clip on separators fit directly on both OEM Ford and aftermarket valve cover tabs. Two piece set contains: Two Valve Cover Mounted Spark Plug Wire Separators.
We also make floating separators for two, three and four wires Sets and floating separators will soon be available in 9mm to fit the Ford Performance wires.