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! Designed 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. Product Details:

• Precisely designed and tested on a real car in the real world
• T304 stainless steel, TIG welded back-purged construction
• Replaces restrictive factory downpipe
• Great power upgrade with uncompromising performance
• Incredible sporty exhaust sound, subtle when cruising
• No drone with factory exhaust

To 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. Application guide F30 BMW 335i & 335xi 2012 - 07/2013 F20/F21 BMW M135i & M135xi 2012 - 07/2013 135i or 335i with a production date after 07/2013 will need the 4" downpipe: Stage 2 software is required to avoid check engine light.