Competition Series 4" Catless Downpipe for the X1/X3/X4/Z4 N20 (4 Cylinder) Engine Finish:Polish Finish our charge pipe come with

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

at the next race

X6 M60i (G06) and X7 M60i (G07)

Since the June 2009+ models charge pipes include what is known as "the meth elbows"

Competition Series 4" Catless Downpipe for the X1/X3/X4/Z4 N20 (4 Cylinder) Engine Finish:Polish Finish our charge pipe come withIntroducing our Competition Series 4" Downpipes 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) Engine. Key Features: Made in the USA! Manufactured in house. Now available for the 2011 15 X1 s xDrive28i 20i 16i, X3 s xDrive28i 20i 18i, X4 xDrive28i 20i 18i and 2011 16 Z4 sDrive28i 20i 18i N20 Engines! Horsepower gains of 14 to 16whp average (gains will