The S55 decat downpipes open up a whole new level of tuning for the M3 and M4. With an excellent, sporty tone and aggressive gear change noises, these downpipes are perfect for any stage 2 car. Manufactured from T304 stainless steel and fully tig welded, using billet steel flanges and high-flow flexible joints.
Please note: These are not MOT compliant and may cause the engine management light to illuminate. This can be cured with a JB4 or alternative tune.