Built for performance and show, the HPS Polish cold air intake kit (converts into short ram) for 2002-2006 Nissan Altima 2.5L 4Cyl relocates the HPS Performance air filter outside of the engine compartment to deliver the coolest air inlet temperatures. Compare to the traditional short ram air intake, HPS long ram cool air intake delivers cooler air with more oxygen, which translates into a more intense explosion in the vehicle combustion chamber to increase horsepower, torque and improve throttle response. The included installation instruction has clear pictures and description to guide the installer throughout the whole process. The kit does NOT require tuning and no modification is required, however, removal of front bumper is necessary during the installation. HPS light weight mandrel-bent aluminum alloy piping replace the stock restrictive air box and optimize the air flow with long lasting durability. HPS cold air induction system features HPS signature race proven reinforced silicone hoses and industrial grade 100% stainless steel T-bolt clamps, which ensure the durability and reliability during the extreme driving condition. The All-New HPS Performance Air Filter is designed with performance in mind, delivering excellent filtration without sacrificing air flow. Washable and reusable. All HPS Performance Air Filters are made in the United States and backed by HPS limited lifetime warranty. CARB Exempt: No. This HPS intake is designed for 2002-2006 Nissan Altima 2.5L 4Cyl. ***Remark: The installation requires the reuse of the stock OEM MAF sensor, MAF sensor shown in the picture is for illustration purpose only and is not included in the kit.