Clamps and gaskets for the downpipe can be found under related products at the bottom of the page!

Downpipe for the different BMW models: 

Downpipe DECAT BMW F07, F10, F11 N47N, N47S1
518d, 520d/dx, 525d/dx
2009-2016
150, 184, 218 hp

Downpipe DECAT BMW F25 X3 N47N,N47S1
18d,20dx
2010-2014
150,184 hp
RWD/xDrive

Downpipe BMW F20, F21 N47N, N47S1
114d, 116d, 118d/dx, 120d/dx, 125d
2010-2015
95, 116, 143, 184, 218 hp

Downpipe DECAT BMW F30, F31, F34 N47N, N47S1
316d, 318d/dx, 320d/dx, 325d
2011-2015
116, 143, 184, 218 hp 

Downpipe BMW F32, F33, F36 N47N, N47S1
418d, 420d/dx, 425d
2012-2015
143, 184, 218 hp

OE Numbers:

18308508993
18308508994
18307823496