Polished 1" Billet Hood Vent Spacer Riser Kits For Turbo/Engine/Motor Swap 8Mm for Ford Mustang Keeps your under the hood temps nice and cool. These spacers are 1" (25mm) tall and include both washers and mounting screws. Add additional spacing to allow better venting for your super or turbo-charged vehicle Need some extra space to accommodate any oversized engine swap? These will do just that! If you are looking for proof, check out Import Tuners writeup.