The S&S Stealth Air Cleaner Kits allow for a significant amount of performance increase through out the rev range. S&S's R&D team puts in extensive amount if time and effort to release the best performing accessories for your machines and they did just that with the Stealth Air Cleaner Kits. They've produced an extra strength synthetic polymer backing plate that is working to reduce the heat that transfers to your intake. S&S has options if you don't want to show off or want one of their awesome covers that are available in chrome or black finishes. High-strength synthetic polymer backplate - Designed to reduce heat transfer to intake air Cooler, denser air allows for more efficient cylinder fill and better performance Included actuator cover, hides TBW servo motor for a clean, attractive installation The S&S Stealth air cleaner backplate in this kit is made from the same high-strength, advanced, synthetic polymers used in high performance automotive intake manifolds and high-end handgun bodies! This material offers superior mechanical properties, thermal stability, and chemical resistance. Designed to reduce heat transfer to the intake air for more efficient induction The built-in stinger cone is featured in most S&S air cleaner kits Designed to direct air smoothly into the bore of the throttle body to reduce turbulence