The Alpha 997 Intercooler System retains full use of the stock intercooler inlets (located in front of each rear wheel) forcing cool air into our larger, carbon fiber shrouds. Not only is this option more aesthetically pleasing, each rigid, OEM-quality, carbon fiber piece is made to seamlessly mate to that Alpha Intercoolers feeding them cooler ambient air more efficiently than the other two alternatives. Not to mention eliminating the removal or destruction of your intercooler ducting. Maximum Airflow For Maximum Horsepower And Torque Another key component to the intercooler system is our computer designed intercooler piping. This features a cast aluminum y-pipe offering 40% more flow. The larger 2.5″ diameter is significantly wider than stock (1.79″) and is black powder coated to provide lasting durability. The Y pipe is cast, conforming to the tight surroundings of the engine bay and the inner walls of the pipe promote the flow of charged air to the intake with minimal amounts of turbulence.