Milltek Sport Downpipes - 2015-2018 BMW M4 F82/F83

These Milltek Sport parts fit the 2015-2018 BMW M4 and M4 Competition coupe (F82) and convertible (F83) with the 3.0 liter S55 twin-turbo six. For the S55 M4, Milltek offers large-bore downpipes with a 200-cell twin race cat, catless downpipes, and secondary cat bypass pipes in non-resonated and resonated forms. A Milltek hot-side part replaces the restrictive factory section with larger, smoother T304L tubing, so exhaust gas leaves the engine with less resistance. Pick a catted version to keep a catalytic converter in the system, or a catless version for a dedicated track car. Where an option names a Milltek cat-back in parentheses, that version is made to join it. The BMW M4 F82 parts are T304L stainless steel with mandrel-bent tubing, which keeps the pipe at full size through each bend and resists corrosion for years. They bolt in place of the factory parts with no cutting or welding.

How to Choose

Choose the Part you need. Secondary Cat Bypass Pipe, Non-Resonated replaces the secondary catalytic converters with a straight section and keeps the primary cats. It is a race product for off-road and track use, without a resonator for the loudest tone. Secondary Cat Bypass Pipe, Resonated replaces the secondary catalytic converters with a straight section and keeps the primary cats. It is a race product for off-road and track use, with a resonator to soften the tone. Catless Downpipes (Milltek Cat-Back) has no catalytic converter. It is for off-road and track use only and needs an ECU remap, and it connects to a Milltek cat-back. Catted Downpipes, 200-Cell Twin Race Cats keeps a 200-cell high-flow catalytic converter. Milltek recommends an ECU remap with it.

Pair them with the Milltek cat-back for the BMW M4 F82 for a complete Milltek exhaust.

Features

• 76.2 mm (3 in) T304L stainless steel pipework
• Mandrel-bent and made to bolt to the factory mounting points
• Catted and catless options explained in How to Choose

What's Included

• Secondary Cat Bypass

Specifications

Fitment Notes

• Fits the 2015-2018 US-market M4 and M4 Competition (F82 coupe, F83 convertible). For 2019-2020 cars, please call us to confirm. The same parts fit the F80 M3, which has its own page.
• The catted downpipes replace the primary cats with a high-flow 200-cell twin cat under the floor. The secondary cat bypass pipes replace only the secondary catalytic converters and keep the factory downpipes. All are race products; catless downpipes are for off-road or track use only and need an ECU remap.
• Catless parts remove the catalytic converter. They are sold for off-road and competition use only and are not legal on public roads in the US.

Questions about fitment? Call (310) 231-0292 or text (310) 886-3111.