+16 HP / +16 lbs. x ft. Max torque gains Factory inlet outlets of 15 % High quality rotomolded one piece sealed case with auxiliary air intake CAD designed rotomolded intake tube High quality billet aluminum adapter for factory smog pump and sump fitting Integrated view window allows easy filter inspection without disassembly Pro 5R air filter pre-oiled, washable/reusable for maximum performance Unique filter-housing interface (patent pending) for easy installation No cutting or drilling on OEM parts for faster installation