Stillen Hi-Flow Intake Kit Nissan Altima Sedan 2013-2014 | 402875

STILLEN Air Intakes The first step in upgrading your car's performance is to replace the restrictive stock air box with a STILLEN Hi-Flow Intake. <br> <br> Additional air flow increases the engine's efficiency and power output by increasing the quantity of the air/fuel ratio. The STILLEN Hi-Flow consists of a K&N cone filter that incorporates a velocity stack which uses the venturi effect to accelerate air intake speed. <br> <br> Power and throttle response will improve throughout the entire RPM range. Your best dollar-per-horsepower investment by far! Most people find the authoritative note of the intake pleasing, but note that increased noise levels will result. <br> <br> Most STILLEN Hi-Flow Intakes are CARB Approved, while others are currently CARB Pending, and may not be 50 state legal until approved. Clean your filter regularly for best results.</p> </p>