F30 F31 F32 F33 BMW 328i 428i Decat Exhaust System, Dinan Free Flow, Part No DIN-EXH-F30-328

Dinan Free Flow exhaust for F30/F31/F32/F33 328i and 428i (N20/N26 engines only). Not for N55 or B48. Bolt-on decat system - no welding, no cutting, no guesswork.

• Stage 1 fast road fit: pairs cleanly with stock ECU maps, N20 stage 1 tunes, or mild N20 stage 2 setups
• Decat pipe + rear section only: retains OEM mid-pipe catalytic converter - legal for UK road use where pre-cat remains fitted
• 70mm twin tips: polished stainless or ceramic black; laser-etched Dinan branding, OEM+ depth without show-car fluff
• Zero drone, zero boom: tuned resonance chamber design - civilised at 70 mph, urgent at 4,000 rpm
• Fits all RWD and xDrive N20/N26 chassis: confirmed on F30 328i, F31 328i Touring, F32 428i Coupe, F33 428i Convertible

Searches this answers: F30 decat exhaust, N20 fast road exhaust, F32 428i track day exhaust, F33 328i stage 1 upgrade, Dinan F30 part number DIN-EXH-F30-328, N20 decat bolt-on, BMW 328i stainless exhaust, F31 Touring exhaust upgrade.