The APR Turbo Intake Pipe is an easy to install bolt-on upgrade that eliminates a restriction before the turbocharger. Unlike manufactured units on the market today, ours is cast in aluminum, allowing for an organically shaped entry that gradually transforms over a great distance. Such a design promotes better flow rather than sharply reducing at the inlet of the turbocharger like other units. It is taller than stock throughout, removes a large internal restriction at the PCV inlet, and exits the factory unit allowing the turbocharger to operate more efficiently. We fully assemble each unit with a billet mounting arm, a billet PCV bung and a new O-ring. The inlet and outlet are CNC machined to control tolerances and ensure comfortable and secure connections. This upgrade is recommended at all stages using an IHI IS12, IS20 or IS38  turbocharger! Features: Cast aluminum construction Factory unit flow rate: 441 cfm vs. 379 cfm @ 28" H2O Larger internal diameter throughout CNC machined inlet and outlet CNC machined stainless steel mounting arms Machined aluminum PCV cap CNC New O-ring Direct bolt-on design easy to install