The CTS Turbo Catless Downpipe BMW N55 (Pneumatic Wastegate) is made to maximize exhaust flow for highest power gains. Do not compromise performance and sound with factory parts - unleash your BMW's potential! \n \nDesigned using the latest in CAD technology; this part is made to fit perfectly in place of your factory downpipe. Manufactured from T304 stainless steel, hand TIG welded and back-purged to ensure years of reliable performance. \n \nProduct Details: \n

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• Precisely designed and tested on a real car in the real world
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• T304 stainless steel, TIG welded back-purged construction
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• Replaces restrictive factory downpipe
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• Great power upgrade with uncompromising performance
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• Incredible sporty exhaust sound, subtle when cruising
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• No drone with factory exhaust
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\nTo remove the CEL that will occur, proper tuning software must be used. Use of proper Bootmod3 software upgrade is strongly recommended. For OFF-ROAD use only. \n \nApplication guide \n \nF30 BMW 335i & 335xi 2012 - 07/2013 \nF20/F21 BMW M135i & M135xi 2012 - 07/2013 \n \n135i or 335i with a production date after 07/2013 will need the 4" downpipe: \n \nStage 2 software is required to avoid check engine light. \n \n