BMW F90 M5 Primary Decat Downpipes - S63M 3 inch - 2018 onwards
Unlock serious performance and sound with our BMW F90 M5 primary decat downpipes. Designed for the S63M twin-turbo V8, these 3 inch stainless steel catless downpipes transform throttle response, turbo spool and exhaust tone. If you are searching for BMW F90 M5 decat downpipes, M5 downpipe upgrade, S63 catless downpipes, primary cat delete or F90 M5 exhaust upgrade, this is the proven solution that delivers power gains and an aggressive soundtrack while retaining excellent motorway manners.
Why choose these BMW F90 M5 decat downpipes
- Manufactured from SS304 aircraft-grade stainless steel for strength and durability
- Precision TIG welded with a brushed stainless finish
- True 3 inch pipework straight off the turbos for faster spool and sharper throttle response
- Mandrel-bent for maximum internal diameter and superior gas flow
- Reduced exhaust backpressure and lower temperatures for consistent performance
- Substantial weight saving compared with the factory catalytic converters
- OEM-style V-band connections - works with the standard V-band clamps to the turbos and to the mid-section
Real-world performance and sound
We have fitted and used these BMW F90 M5 primary decat downpipes ourselves and the results are superb. Expect noticeable power gains, quicker turbo response and a deeper, more aggressive exhaust note with addictive crackles and bangs when you want them, yet a refined, quieter tone on the motorway. On our test vehicles we have seen increases of around 40 to 50 bhp, and with a stage 2 map these downpipes support gains in the region of 150 to 180 bhp.
Fitment and compatibility
- BMW M5 F90 chassis - 2018 onwards - S63M twin-turbo V8
If your car is a later model with an OPF or PPF filter, this will need to be coded out by your tuner to prevent a fault warning. Speak to your tuner if you are unsure, as earlier cars did not have OPF or PPF.
Installation advice
Professional installation is recommended. Tolerances can vary slightly from car to car, though feedback from our customers is that these downpipes are straightforward to fit and align. We also recommend adding a lambda or O2 sensor spacer to help prevent the engine management light in most cases.
Want fitting by experts who know these cars inside out? Nforcd offers installation in Warwickshire. Email Sales@nforcd.com for a quote.
Warranty and peace of mind
Supplied with a lifetime warranty for total confidence.
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For motorsport and off-road use where applicable. Check local regulations regarding removal of catalytic converters and OPF or PPF systems.