Stainless Steel Exhaust Decat Downpipe. BMW G11 740I B58. BMW F30 F31 F34 M340I 3.0 B58. BMW F32 F33 M440I 3.0 B58. Mandrel Bent T-304 Stainless Steel. Straight-through design allows more air through to improve horsepower and overall performance.
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