BMW F30 F31 F32 F33 F34 F36 N57N 330d 430d 435d rear exhaust silencer backbox - Supersprint 989406

Direct-fit rear silencer for BMW F-series with the N57N engine - no cutting, welding or guesswork. Bolt-on replacement for 330d, 430d and 435d models including xDrive variants.

Supersprint’s 989406 backbox uses full stainless steel construction, precision mandrel bends and OEM-spec hangers and flanges. Designed for fast-road use: deeper, cleaner diesel tone without drone or cabin resonance.

• Exact fit: Matches OEM mounting points and pipe diameters
• Track-day ready: Robust enough for spirited driving, durable enough for daily use
• No compromise: Not a budget copy - proper Supersprint engineering and finish