advanced FLOW engineering (aFe Power), an industry leader in performance cold air aFe Stage 2 sealed cold air intake systems feature a durable, one-piece 18-gauge powder coated heat shield that blocks out engine heat and installs using factory-mounting locations and is finished off with a black powder coated top for an aggressive yet stealthy style. This system also includes a performance engineered intake tube to maximize air velocity and improve horsepower, torque, and throttle response.54-11772 includes the patented Pro-5R filter, which utilizes 5-layers of progressive cotton media that produces excellent filtration and maximum flow. 51-11772 includes the brand new Pro Dry S filter, which uses a progressive synthetic media, which requires no oil to recharge for maximum convenience. In recent testing, part number 54-11772 outflows the factory intake by 58% and produced an astonishing 14hp and 10ft. lbs. of torque. Part Number 51-11772 has an MSRP of $435.00 and is available in stores now. Part Number 54-11772 has an MSRP of $443.75 and is available in stores now.