{"product_id":"cat-back-exhaust-system-142","title":"Cat-Back Exhaust System","description":"The RVG Performance Hi-Flow Race Catted downpipe is engineered as a direct replacement for the factory unit on BMW N55 PWG turbo engines, specifically for F10\/F11\/F07 535i\/Xi, F12\/F13 640i, and E70\/E71 X5\/X6 models. Constructed from SS304 stainless steel, this downpipe features a highly optimized, wider diameter, and smooth mandrel-bent design to significantly increase airflow. This improved flow results in a quicker turbo spool, a noticeable increase in horsepower, and a deeper exhaust note. Additionally, by reducing engine bay temperatures, it enhances the longevity of turbos, valve seals, hoses, and plastic components.\n\nFor optimal performance gains, RVG Performance recommends combining this downpipe with a Bootmod3 tune. They provide specific performance figures for various stages and octane levels, such as \"Stage 2 93 octane: 30%HP \/ 42%TQ\" and \"Stage 2 E30 octane: 33%HP \/ 45%TQ\".\n\nThis product is intended strictly for racing competition use and cannot be installed on road-legal vehicles. It is important to note that RVG Performance downpipes sold for a 2008 535xi are reported to not fit due to pipes being slightly too long at the end. The product comes with a lifetime warranty against manufacturing defects.","brand":"RVG Performance","offers":[{"title":"Default Title","offer_id":52689380770104,"sku":"RVG-N55-CAT-F10","price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687661829.webp?v=1784905971","url":"https:\/\/store.motormia.co\/products\/cat-back-exhaust-system-142","provider":"MOTORMIA","version":"1.0","type":"link"}