Downpipe Milltek BMW 3 Series F80 M3 2014-2018, 4 Series F82-F83 M4 2014-2018 - with 200 CPSI High-Flow Cat

Milltek Sport High-Flow Cat Downpipe for BMW 3 Series F80 M3 / 4 Series F82-F83 M4

Want a Stage 2 on a BMW 3 Series F80 M3 / 4 Series F82-F83 M4 without giving up the catalytic converter? This large-diameter Milltek Sport downpipe pairs a high-flow catalytic converter with an open tube for a more responsive turbo.

Technical specifications

• Milltek part number: SSXBM1030
• Part type: High-flow cat downpipe
• Details: Large-diameter downpipe and 200 CPSI high-flow catalytic converter
• Tube diameter: 76.2 mm (3 inches)
• Installation information: Milltek exhaust system fitment, requires lambda sensor extensions (BMW parts: 2 x 18307851168)
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• BMW 3 Series F80 M3 3.0 Biturbo (M3 Competition incl., Sedan, 2014-2018, without DPF)
• BMW 4 Series F82-F83 M4 3.0 Biturbo (M4 and M4 Competition, Coupe, Convertible, 2014-2018, without DPF)

Not sure about compatibility with your vehicle? Contact us with your VIN before ordering.

Frequently asked questions

• Is an ECU tune required? Yes. A matching Stage 2 map is essential to make the most of the gain and avoid a check engine light related to the lambda sensors. It's the question buyers ask most often, and the answer is always the same.
• 200 CPSI high-flow cat: it retains genuine emissions control while flowing considerably more than the original unit. It's the choice of tuners who want to keep the vehicle emissions-compliant.
• Exhaust compatibility: this downpipe is designed to connect to a Milltek exhaust system. Check the correct version if you keep the original exhaust.

Why choose Milltek Sport?

Customer feedback most often mentions the fit quality and a deep tone that is present but never harsh. This is the Milltek Sport signature, from the British manufacturer specialized in stainless steel exhausts.

Further reading

• Downpipe: decat or high-flow cat for your Stage 2?