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Features
Tig Welded & Mandrel Bent Stainless Steel
Integrated O2 Sensor Plugs For Wideband
Engineered and Tested to Exceed Original Equipment Standards and Performance
Fitment
2011-2012 BMW 1 Series E82 E88 - 135i N55 Engine
2011-2012 BMW 3 Series E90 E91 E92 E93 - 335i N55 Engine

