Our performance decats instantly increase power by allowing exhaust gasses to exit the vehicle quicker. Our decats are designed to be direct replacements for the OEM catalytic converter, ensuring smooth installation every time. ---Manufactured from highest quality T304 grade stainless steel ---Mandrel bent and fully TIG welded for strength and durability ---Free flowing catalyst replacement to get the most from the N55 engine ---Designed to improve power and torque across the entire RPM range ---Sold for off road and track use only Fitment: BMW 1 Series E82 135i N55 2010-2013 models BMW 3 Series E90, E91 & E92 335i N55 2010-2012 models Please Note: This decat is only suitable for models with the N55 engine.