Mazda Miata NA 1990-1997 GVK LipThe AG Limited GVK '90 '97 Miata NA front lip is the ideal air dam for cars seeking an aero advantage. Possibly the biggest lip available for the NA, the GVK prevents air from flowing under the front of the car to maintain stability at high speeds. Without any holes or ducts for air to pass through, the lip prevents the build up of high pressure under the nose of the car, keeping the front end planted. Made from polyurethane, the GVK is very durable.