This Momentum GT intake system outflows the factory intake by 48%. The one-piece sealed housing includes auxiliary air inlet to eliminate the use of multiple-piece housings and ensure the coolest air intake charge available. A large, clear sight window is used for a hassle-free filter inspection and an aggressive style. A urethane plug is also included if you wish to block off the auxiliary air inlet. This system uses a high quality, dyno-tuned intake tube to achieve maximum power gains while maintaining a perfect fit. A custom high temperature reinforced silicone elbow coupling with aluminum fitting is included for easy install to the factory breather line. Momentum GT Cold Air Intake System w/ Pro 5R Media Audi A4 (B8) 09-16 I4-2.0L (t) Audi A4 (B8) 09-16 I4-2.0L (t)