Our Air Cleaner and Timing cover sets are Custom CNC machined from high strength, 6061-T6 aircraft grade billet aluminum. Finished with a durable powder coat finish that will add class and style to your Harley Davidson motorcycle. Air Cleaner covers fit Screamin' Eagle High Flow Air Cleaner Kits (K & N Filter Number: HD-0818, HD-0800, OEM Reference: 29442-99A) Base and air cleaner filament not included. Cover Inside Diameter: 6 in (152 mm) Deep Cut 5-hole Timing Covers fit all 1999-Newer Twin Cam Bikes - all models of Dyna, Softail and Touring. Custom designs are machined into the aluminum before painting for the "Eclipse" and after for the "Contrast" series.. Matching Derby covers, other road names/slogans, designs and colours available for purchase online at www.bigborecustom.com We accept Visa, Mastercard, PayPal, E-transfer and ship worldwide from our shop in Parksville BC via Canada Post. Makes the perfect gift.