The Injen SES21128ICP Cold Side Intercooler pipe is the next logical step in your search for power gains in your N55 equipped BMW. This easy to install performance charge pipe system allows that turbocharged engine to breathe deeper to unleash that additional performance that you've been craving. These charge pipes pair perfectly with our cold air intake systems for even greater performance gains; The Injen Technology engineers spent abundant amounts of time designing, testing, and perfecting this performance intercooler charge pipe system to develop some serious bolt-on power. The soul of this charge pipe system is with our mandrel-bent, over-sized and stepped 3.00"to 2.50"T6-6061 aluminum tube that provides a smooth uninterrupted path for highly efficient airflow and a look that will impress every time you open your hood! The engineering team also developed precision CNC machined adapter flanges that mimic the OE-Style connections for a clean and simple install. , , As always, Injen Technology also offers this performance charge pipe system in multiple finishes. You can choose from our polished version (SES1128ICP), Wrinkle Black (SES1128ICPWB), and Wrinkle Red (SES1128ICPWR) finishes. To top it all off, the SES1128ICP performance charge pipe system includes the unbeatable Injen Technology limited Lifetime Warranty!