NOTE: 7mm, 7.5mm, 8mm, and 8.5mm kit have the details on the face like the original Ford units. The 9mm and 10mm kits have a smooth face.
 
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 7mm, 7.5mm, 8mm, 8.5mm, 9mm, or 10mm 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. Four piece kit contains: Two valve cover mounted spark plug wire separators and two floating separators for four spark plug wires.
 
We also make floating separators for two, three and four wires