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With this billet valve cover
Air temperature 32°C lower than OEM
Galvanised
With a 57% larger volume than the original and an efficient cooling design
Alpha Competition Decat Downpipes BMW X3M / X4M F9x bmw-x7-g07---19----40ix-esi2852917 With this billet valve coverThe Alpha Competition decat Downpipes for the BMW X3M X4M F9x are made from high quality T304 stainless steel and have a diameter of 3. 15" 80mm. These downpipes fit without modification between the turbos and the front manifolds of the S58 engines, and remove the main catalytic converters. With hand welded TIG joints, these downpipes offer excellent value for money. These downpipes are designed for direct fitment and can optionally be fitted with
