Downpipe Milltek BMW 4 Series F32 428i 2.0T (N20 Engine) 245hp 2014-2018, with High-Flow Catalytic Converter

Milltek Sport downpipe with high-flow catalytic converter for BMW 4 Series F32

This Milltek Sport downpipe with high-flow catalytic converter for BMW 4 Series F32 frees up exhaust flow at the turbo outlet while retaining a high-flow sport catalytic converter: the best compromise between performance and emissions control.

Technical Specifications

• Milltek Part Number: SSXBM977
• Part Type: Downpipe with high-flow catalytic converter
• Details: Large-diameter downpipe and high-flow catalytic converter
• Tube Diameter: 76.2 mm (3 inches)
• Fitment Information: Fitted with Milltek exhaust system, ECU remap required, compatible with automatic and manual gearboxes
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (United Kingdom)

Compatible Vehicles

• BMW 4 Series F32 428i 2.0T (N20 Engine) 245hp (No tow hook, Automatic, RWD, Coupe, 2014-2016)
• BMW 4 Series F32 428i 2.0T (N20 Engine) 245hp (No tow hook, Manual, RWD, Coupe, 2014-2018)

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

Most Frequently Asked Questions

• Is an ECU remap required? Yes. A suitable ECU map (Stage 2) is essential to get the gains and avoid an engine warning light related to the lambda sensors. It's the question buyers ask most often, and the answer is always the same.
• 200-cell high-flow catalytic converter: it retains genuine emissions control while flowing significantly more than the original. It's the choice of tuners who want to keep their vehicle clean.
• 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?

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

Further reading

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