DPF-Back Milltek BMW 3 Series G20-G21 M340i, 4 Series G22 M440i - ECE Homologated - Post-DPF fitting - OEM outlets

Milltek Sport DPF-back exhaust for BMW 3 Series G20-G21 / 4 Series G22

Replacing the factory exhaust with a Milltek Sport DPF-back system brings back the character that the engine of your BMW 3 Series G20-G21 / 4 Series G22 is muffled by from the factory: a rounder sound at idle that opens up clearly through the revs, without gimmicks.

Technical specifications

• Milltek part number: SSXBM1157
• Part type: DPF-back exhaust
• Configuration: with valves
• Detail: ECE homologated - Fitted after DPF - OEM outlets
• Pipe diameter: 76.2 mm (3 inch)
• Outlets: original outlets retained
• Tip finish: original style
• Fitting information: Requires cutting the factory exhaust - With valve
• Material: aerospace-grade stainless steel
• Homologation: ECE / EC homologated
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• BMW 3 Series G20-G21 M340i 374 hp (xDrive, Sedan - Wagon, 2019-2025, with DPF)
BMW 4 Series G22 M440i 3.0 biturbo 374 hp (xDrive, Coupe, 2020-2025, with DPF)

• What about the neighbors in the morning?
The valves are controlled as on the original: closed and quiet on startup or in comfort mode, fully open in sport mode.
• Homologation:
this exhaust is ECE / EC homologated, a real advantage for driving with peace of mind and passing the technical inspection.
• Fitting:
installation requires cutting the factory exhaust. We recommend having a professional handle the fitting.

A benchmark among European tuners, Milltek Sport develops each of its systems directly on the vehicle. Mandrel bends, careful welds and aerospace-grade stainless steel ensure a system that lasts and sounds right.

• Further reading
• Valved exhaust: how does it work and should you keep the valves?
Exhaust systems and technical inspection in France