Mini Teardrop Stealth Air Cleaner KitBuilt-in stinger cone directs air smoothly into the EFI throttle body to reduce turbulence and increase flow 85% of original size for perfect proportions; all laid over the easy to install Stealth Air Cleaner system Machined openings around the rim add style and provide additional air flow Kit includes backing plate, filter and hardware 5% increase in hp Made in the U.S.A. For 01-17 Twin Cam with Delphi EFI (except throttle-by-wire models).