{"product_id":"4-5-stainless-steel-cat-back-exhaust-downpipe","title":"4.5\" Stainless Steel Cat-Back Exhaust Downpipe","description":"The VRSF Downpipe Upgrade with Catalytic Converter is engineered to significantly improve exhaust flow and performance in vehicles equipped with the B58 engine. By replacing the restrictive factory catalytic converter, this downpipe reduces back-pressure, leading to noticeable gains in horsepower and a more aggressive exhaust note. The unit is meticulously handcrafted from 4.5-inch, 304-grade stainless steel, featuring smooth radius bends designed to minimize turbulence and optimize flow through the system.\n\nConstruction involves tig-welding for durability and precision. It incorporates a 200-cell high-flow catalytic converter, balancing performance enhancement with emissions control. It is compatible with both the stock cat-back exhaust and all aftermarket cat-back systems, offering flexibility for various setups. VRSF provides a 1-year limited warranty on this product.\n\nPerformance gains are estimated between 25-30hp when the downpipe is used in conjunction with an ECU tune. It is important to note that this product is not for sale or use in the state of California on any pollution-controlled vehicle, as per the California Air Resources Board (CARB) regulations. The specific vehicle applications include BMW models such as the M240i, 340i, 440i, 540i, 740i, and 840i, across various model years and xDrive configurations (F22, F23, F30, F32, F33, F36, G11, G14, G15, G30, G32).","brand":"VRSF 4.5\"","offers":[{"title":"Default Title","offer_id":52664100651320,"sku":"10582020","price":449.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687538403.jpg?v=1784333249","url":"https:\/\/store.motormia.co\/products\/4-5-stainless-steel-cat-back-exhaust-downpipe","provider":"MOTORMIA","version":"1.0","type":"link"}