Allows for viewing of the internal moving engine components. CNC-machined from billet aluminum. Hardware included. Contrast Cut finish starts with a polished top cover that has been black anodized, then recut to open up the design. Black Ops features gloss black on top of contrasting textured black for outstanding durability and good looks. Matching Clarity air cleaner and derby cover available. Made in the USA. The RSD Clarity Cam Covers contain two pre-installed Lexan polycarbonate windows. These windows are very resistant to almost everything a motorcycle will be exposed to. However, extra care and preparation must be taken when installing the cam cover near the exhaust system. The Lexan polycarbonate windows must be at least 5/16in. away from the exhaust pipe to insure the temperature does not exceed the capabilities of the Lexan. Additional clearance is recommended to preserve the optical clarity of the Lexan window as well as reducing the amount of heat introduced to the engine from the exhaust. Take measurements when installing the exhaust system and make sure that the exhaust NEVER contacts the Lexan windows, bolts or the aluminum cam cover. Lexan is very durable but it must be treated just like any plastic and cannot come into contact with the exhaust pipes. The Lexan windows, just like any plastic, will melt if in direct contact with the exhaust pipe. If the Lexan windows have less than adequate clearance premature discoloration, cracking or melting may occur causing severe failure and/or possible injury to the rider. RSD recommends the use of high pipes or exhaust that runs above the cam cover which eliminates any potential exhaust contact. TECHNICAL GUIDELINES FOR CLARITY CAM COVER:.1. There must be at least 5/16in. between the exhaust and the Lexan windows, bolts and cover. 2. Absolutely no contact between the Lexan windows, bolts or alminum cam cover. 3. Do not use brake cleaner, acetone or any harsh chemicals during installation. 4. Use Plexus cleaner for cleaning. If any other cleaners are used, read the.