Milltek Cat Replacement Pipe BMW 3 Series F80 M3 2014-2018, 4 Series F82-F83 M4 2014-2018, Secondary Decat Pipe with Muffler

Milltek Sport Decat Pipe for BMW 3 Series F80 M3 / 4 Series F82-F83 M4

This Milltek Sport decat pipe for BMW 3 Series F80 M3 / 4 Series F82-F83 M4 replaces the catalytic converter with a free-flowing stainless steel tube, for maximum flow and a more aggressive sound.

Technical specifications

• Milltek part number: SSXBM1144
• Part type: Decat pipe
• Details: Secondary catalyst replacement with muffler
• Tube diameter: 76.2 mm (3 inches)
• Installation information: Fits Milltek exhaust system (all versions) with OEM or Milltek downpipes
• 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.
• What about the technical inspection? A decat pipe will not pass the emissions inspection. This product is intended for motorsport use only.
• Exhaust compatibility: this pipe is designed to connect to a Milltek exhaust system. Check the correct version if you keep the original exhaust.

Why choose Milltek Sport?

Milltek Sport designs and manufactures its exhausts in England, using mandrel-bent tubing to preserve the inner diameter and a fit developed on the vehicle. The result: a clean installation with no modification needed, and a sound tuned to stay pleasant for everyday driving.

Further reading

• Downpipe: decat or high-flow cat for your Stage 2?
• Exhaust systems and technical inspection in France

Product intended exclusively for motorsport use on closed circuits. Use on public roads is not permitted.