{"product_id":"circuit-werks-catless-downpipe","title":"Circuit Werks Catless Downpipe","description":"The Circuit Werks 4\" catless downpipe is engineered to enhance the performance of N55 BMW engines by eliminating the restrictive factory catalytic converter. This modification significantly reduces back pressure, resulting in faster turbo spool, noticeable power gains, and a more aggressive exhaust sound. The downpipe is meticulously crafted from hand-welded stainless steel, featuring smooth radius bends to minimize turbulence and maximize flow, along with CNC-machined stainless steel flanges for a precise fit.\n\nThis 4-inch downpipe is specifically designed for BMW models produced after 07\/13 that utilize an electronic wastegate, including the M135i and 335i models. It is also compatible with all M235i and 435i models, as well as the F87 M2.\n\nKey features include its robust stainless steel construction, TIG welding for durability, and smooth radius bends that promote optimal airflow. The product is designed to deliver an estimated 20-25 horsepower gain when paired with a tune.","brand":"GBR","offers":[{"title":"Default Title","offer_id":52688539287864,"sku":"DP-BMWN5514-4\"(PG-435)","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/663688992.webp?v=1784890728","url":"https:\/\/store.motormia.co\/products\/circuit-werks-catless-downpipe","provider":"MOTORMIA","version":"1.0","type":"link"}