Milltek Large-bore Downpipe and De-cat for BMW M4 F82 F83 and M4 Competition Coupe Non-OPF
Upgrade your BMW M4 exhaust with the Milltek Large-bore Downpipe and De-cat and unlock serious flow, sound and response. This high-performance Milltek downpipe is designed to fit with the Milltek Sport cat back exhaust system only, delivering a free-flowing catless solution that transforms throttle response and turbo spool while adding an aggressive, motorsport-inspired exhaust tone. Hand-finished in the UK from aerospace grade type 304 stainless steel, this Milltek Sport de-cat downpipe is built to last and built to perform.
At Nforcd we have used this Milltek downpipe on customer BMW M4 builds and the feedback has been consistently outstanding. Customers love the sharper response, the stronger mid-range and the authentic Milltek sound quality with no harsh drone when paired with the Milltek cat-back. If you are searching for BMW M4 downpipe, M4 F82 F83 decat, M4 Competition decat downpipe, Milltek Sport downpipe, catless downpipe upgrade or large bore downpipe for M4, this is the go-to choice.
Why choose this Milltek downpipe
- Large-bore, mandrel-bent design for optimised gas flow and reduced back pressure
- Catless de-cat configuration for maximum flow and a more aggressive exhaust note
- Crafted in the UK from type 304, non-magnetic stainless steel for durability and corrosion resistance
- Precision hand-finished pipework and welds for a perfect fit with Milltek Sport cat-back systems
- Comprehensive acoustic development delivers a sporty, crisp tone without unwanted cabin drone when used with the Milltek cat-back
- Ideal exhaust upgrade for tuning-focused M4 owners seeking performance, response and sound
Fitment and requirements
- BMW F82 M4 Coupe
- BMW F83 M4 Convertible
- BMW M4 Competition Coupe
- Non-OPF models only
- Fits with Milltek Sport cat back exhaust system only
- Requires 2 x 18307851168 for installation, available from your local BMW dealer
Built the Milltek way
Milltek Sport designs, develops and hand-finishes every system in the UK. Using aerospace grade type 304 stainless steel throughout the pipework, silencers and hardware ensures long-lasting performance and superior resistance to discolouration. Mandrel bending maintains constant radius bends to keep gas flow smooth, while the enlarged bore over stock supports performance without sacrificing driveability.
Professional fitting
For hassle-free installation, we recommend professional fitting at Nforcd in Warwickshire. Request a quote at Sales@nforcd.com and our team will take care of everything.
Search-friendly quick hits
Milltek M4 downpipe. Milltek Large-bore Downpipe and De-cat. BMW M4 F82 downpipe. BMW M4 F83 decat. M4 Competition downpipe non-OPF. Catless downpipe for BMW M4. Milltek Sport de-cat downpipe. Large bore downpipe upgrade. Performance exhaust upgrade for M4. BMW M4 decat downpipe track use.
Note: De-cat products are intended for off-road and track use where permitted. Check local regulations before purchase and installation.