Large Bore Downpipe with Hi-Flow Sports Catalyst (Audi RS3 8V+8Y/RSQ3/TTRS MK3) BMW > 4 Series > F82/83 M4 Coupe/Convertible & M4 Competition Coupe�� (Non-OPF equipped models only) > 2014 to 2018 2mm) pipework and fit from

2mm) pipework and fit from the Gasoline Particulate Filter section backwards (GPF-back) this exhaust replaces the centre and rear sections

- Milltek Sport are the sole UK distributor of HJS Tuning Catalysts

7dB) - Static 4

Audi A3 8P etc)

and it was an instant success

Large Bore Downpipe with Hi-Flow Sports Catalyst (Audi RS3 8V+8Y/RSQ3/TTRS MK3) BMW > 4 Series > F82/83 M4 Coupe/Convertible & M4 Competition Coupe�� (Non-OPF equipped models only) > 2014 to 2018 2mm) pipework and fit fromMilltek Sport Large Bore Downpipes are perfect when looking to improve both performance and sound. These downpipes are fabricated with a larger diameter than standard OEM parts, meaning that there is significantly more space for more gas to exit the engine and pass through, increasing efficiency. Combined with our Hi Flow Sports Cat, you can expect a significant increase in performance and a noticeable difference in sound aesthetic. Stage 2 ECU Remap