{"product_id":"n55-catless-turbo-downpipe-exhaust-system","title":"N55 Catless Turbo Downpipe Exhaust System","description":"The Flashark N55 Catless Turbo Downpipe Exhaust System is designed to enhance the performance of BMW models equipped with the N55 engine, specifically the 2013-2019 F-chassis 335i, 435i, M135i, M235i, and M2.\n\nIt aims to improve throttle response, reduce turbo spool-up times, and increase torque. With a Stage 2 tune, estimated gains of 20whp and 30wtq are expected.\n\nInstallation of this catless downpipe requires a mandatory Stage 2 ECU tune to prevent check engine lights and optimize engine performance, as the N55 runs richer and hotter without the catalytic converter's heat absorption. Running without a tune can lead to poor drivability, potential limp mode, and even reduced power. Supporting modifications like an upgraded intake and charge pipe are also recommended for optimal performance, especially for builds aiming for 500whp+.\n\nIt is important to note that this catless downpipe is not street legal in most states due to emissions regulations, including California Vehicle Code Section 27156. It is intended for off-highway use or track-only applications. The exhaust note will be significantly louder, which may be undesirable for some during long highway trips. Installation can be performed by individuals with basic mechanical skills and proper tools, though professional installation is also an option.","brand":"Flashark","offers":[{"title":"Default Title","offer_id":52688274227512,"sku":"DP29748","price":125.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/662660331.webp?v=1784889120","url":"https:\/\/store.motormia.co\/products\/n55-catless-turbo-downpipe-exhaust-system","provider":"MOTORMIA","version":"1.0","type":"link"}