SLN Performance - BMW B58 5” Ceramic Coated Decat Downpipe M140i M240i 240i 440i K&N Filters If you are unsure about

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SLN Performance - BMW B58 5” Ceramic Coated Decat Downpipe M140i M240i 240i 440i K&N Filters If you are unsure aboutSLN Performance BMW B58 5 Ceramic Coated Decat Downpipe M140i M240i 240i 440i The SLN 5" Ceramic Coated super decat downpipe is made to fit the legendary Gen 1 BMW B58 (OPF Gen2 downpipes also available). The bore of this pipe is massive, the 5" tube gradually steps into the 4" flexi pipe, which is the biggest pipe combination available on the market today for the Gen 1 B58. This design ensures maximum, uninterrupted flow and is for those that want