Sold in pairs, these Yonaka Motorsports flanges for the BMW 135i/335i twin turbo are CNC machined from 304 stainless steel. Each flange has an inner lip (see photo) so that a 2.5" pipe can fit and rest inside.
2007-2010 BMW 135i/335i 3.0L Twin Turbo N54
ID (with lip): 2.36"
Warranty: 1 year