Sports Series 4" High Flow Catted Downpipe for the X1/X3/X4/Z4 N20 (4 Cylinder) Engine Finish:Polish Finish This beaded edge prevents the

This beaded edge prevents the intercooler piping from slipping off the connection from boost pressure

a more aggressive exhaust sound is produced

our charge pipe come with two 1/8" NPT  threaded bung (for methanol or nos injectors) welded to our charge pipe

the factory downpipes reduces size using short transitions from 4

There are some enthusiasts out there that don't like the flash or the attention that a front mounted intercooler (FMIC) brings

Sports Series 4" High Flow Catted Downpipe for the X1/X3/X4/Z4 N20 (4 Cylinder) Engine Finish:Polish Finish This beaded edge prevents theIntroducing our Sports Series 4" High Flow 200 Cell Metallic Catted Downpipes for your 2011 15 X1 s xDrive28i 20i 16i, 2011 17 s xDrive28i 20i 18i, 2014 18 X4 xDrive28i 20i 18i and 2011 16 Z4 sDrive28i 20i 18i N20 (4 Cylinder) Engine. Key Features: Made in the USA! Manufactured in house. Now available for the 2011 15 X1 s xDrive28i 20i 16i, 2011 17 s xDrive28i 20i 18i, 2014 18 X4 xDrive28i 20i 18i and 2011 16 Z4 sDrive28i 20i 18i N20 (4 Cylinder)