Milodon's Valve Covers offer an exclusive design difference from all other valve covers. Placement of the breather holes and breather baffles reduce oil drip from the breathers. The valve cover gasket flanges are wide, square and straight to allow proper gasket seating. All valve covers are triple chrome plated and include breather grommets. Tall style valve covers are intended to accommodate higher cam lift, bigger rocker arms and poly locks. Tall valve covers do not allow for air conditioning, power brake boosters, etc.