High-quality downpipe for BMW E46 330d, 330xd, 330Cd with M57 and M57N engines. Exclusively crafted by KPerformance, our full 3″ (76mm) downpipe maintains a bolt-on fitment while maximizing exhaust flow and minimizing backpressure, resulting in sharper throttle response, increased performance, and a deeper, more aggressive exhaust tone. FITS THESE BMW MODELS: BMW 3 Series: E46 [1999-2005] 330d (135kw / 184hp) – M57 330xd (135kw / 184hp) – M57 330d (150kw / 204hp) – M57N 330xd (150kw / 204hp) – M57N 330Cd (150kw / 204hp) – M57N Note: If your model is not listed here, look for it under another product. If you cannot find your model anywhere, contact us for assistance. SPECIFICATION: • Direct bolt-on fitment • Stainless steel (SS304, 1.5mm) • Downpipe diameter: 3″ (76mm) • Connection to exhaust (stock): 55mm • One socket for lambda (oxygen) sensor OE reference numbers: 18 30 7 789 987, 18307789987, 7789987, 18 30 7 789 990, 18307789990, 7789990, 18 30 7 789 988, 18307789988, 7789988, 18 30 7 788 607, 18307788607, 7788607, 18 30 7 780 074, 18307780074, 7780074, 18 30 7 786 245, 18307786245, 7786245, 18 30 7 788 006, 18307788006, 7788006