Agency Power Race Downpipes - 10-12 BMW 135i 335i N55 2GTACOBF it may be necessary to

it may be necessary to change the initial settings depending upon air cleaner and air flow meter type

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Agency Power Race Downpipes - 10-12 BMW 135i 335i N55 2GTACOBF it may be necessary toAgency Power's downpipes are designed to improve your turbo charged vehicles performance. These pipes are made from polished 304 stainless steel. The N55 engine runs a single turbo setup as the predecessor to the N54 twin turbo engine. It connects to the single turbo like stock with a V Band clamp and then connects to the section 1 mid pipes. The downpipe has an inside diameter of 4? with 2. 5? flanges. The larger diameter design will improve exhaust