Our back box deletes are designed and manufactured to enhance the sound and appearance of the rear of your M135i. All systems are designed in house using the OEM mounting points to ensure smooth fitment every time. ---Polished tailpipes designed to fit beneath the OEM rear valance ---Designed to fit the original exhaust system ---Mandrel bent and fully TIG welded for strength and durability ---High flow design replacing the OEM silencing back box ---Manufactured from highest quality T304 grade stainless steel Compatible with: BMW 1 Series M140i B58 F20 / F21 2016-2019.
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