These stainless steel made Alpha Competition decat downpipes, in 3.5" / 89mm diameter, fit without modification between the turbos and the front pipes of the S63 engines fitted to the BMW M5 F10 / M6 F1x in order to remove the OEM catalysts. Manufactured from high quality T304 stainless steel with handmade TIG welds, these downpipes will bring a particularly aggressive sound and an average gain of 28hp on a stage 1 tuned engine. With a high flow structure able to support over 1000hp, these Alpha Competition decat downpipes clearly represent the best value for money on the market !

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Direct mounting

2-piece kit

100% T304 stainless steel

3.5" / 89mm piping

Measured gain on stage 1 tuned engine : 28hp

Aggressive sound

Handmade TIG welds

Assembly kit included

Lifetime warranty