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 - Milltek Sport are the

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

featuring a rear silencer with a frequency enhancing chamber

and it was an instant success

Audi A3 8P etc)

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

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 - Milltek Sport are theMilltek 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