Below is information direct from Germany regarding this product.
It may show additional information about fitment and specification.
The WAGNERTUNING Downpipe Kit for BMW N54 engines fits to:
BMW 135i E82/E88
BMW 1er M E82
BMW 335(x)i E90/E91/E92/E93
BMW 335is E92 2009-2013
true 70mm Downpipes
made from 1.4301 (SS304) Stainless Steel
no catalytic converters*
1:1 exchange to OEM Units
for track and test
with flex part
*ECU will need to be coded to avoid engine management light errors.