{"product_id":"bmw-g8x-m3-m4-400-cell-catted-downpipes","title":"BMW G8X M3 \/ M4 400 Cell Catted Downpipes","description":"Valvetronic Designs 400-Cell Catted Downpipes for the BMW G80 M3, G82 M4, and G87 M2 are engineered to enhance the performance of the S58 platform while maintaining catalytic functionality.\r\n\r\nThe high-flow 400-cell metallic catalysts reduce exhaust restriction, allowing improved turbo response and stronger mid-range performance. Compared to factory downpipes, these units increase flow while preserving drivability and helping reduce unwanted exhaust odor commonly associated with catless setups.\r\n\r\nConstructed from premium stainless steel and designed for direct bolt-on installation, these downpipes deliver a more aggressive exhaust tone with reliable long-term durability. Tuning may be required to prevent check engine lights and achieve optimal results.\r\n\u003cul\u003e\t\u003cli\u003eHigh-flow 400-cell metallic catalysts\u003c\/li\u003e\r\n\t\u003cli\u003eimproved turbo spool\u003c\/li\u003e\r\n\t\u003cli\u003ereduced backpressure\u003c\/li\u003e\r\n\t\u003cli\u003ebolt-on OEM fitment\u003c\/li\u003e\r\n\t\u003cli\u003estainless steel construction\u003c\/li\u003e\r\n\t\u003cli\u003edeeper exhaust tone\u003c\/li\u003e\r\n\t\u003cli\u003ereduced odor vs catless\u003c\/li\u003e\r\n\t\u003cli\u003edesigned to minimize CEL with proper tuning.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003eAttributes:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eBrand Name: \u003c\/b\u003eValvetronic Designs\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGTIN: \u003c\/b\u003e00810201226419\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eFinish: \u003c\/b\u003eBrushed\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eInstallation Notes: \u003c\/b\u003eOEM Replacement\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eMaterial: \u003c\/b\u003eStainless Steel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eOutlet Quantity: \u003c\/b\u003e1\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWhat is Included: \u003c\/b\u003eDownpipe(s) \u0026amp; Hardware\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003eExtended Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eCountry of Origin: \u003c\/b\u003eCN\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEmissions : \u003c\/b\u003eEPA Eligible\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003ePacking Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eQuantity of Each: \u003c\/b\u003e1\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePackage UOM: \u003c\/b\u003eEA\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDimension: \u003c\/b\u003e31.375 x 12 x 8.25 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e21.5 POUNDS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cdiv id=\"sema-product-fitment\" class=\"product__accordion accordion fitment\"\u003e\u003c\/div\u003e","brand":"Valvetronic Designs","offers":[{"title":"Default Title","offer_id":66757714018349,"sku":"JZYF-BMW.G8X.M2.M3.M4.FF.400C.BR","price":4499.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2780\/2157\/files\/ChatGPT_20Image_20Feb_2028_202026_2008_42_09_20PM.png?v=1779557890","url":"https:\/\/montgomeryparts.com\/products\/bmw-g8x-m3-m4-400-cell-catted-downpipes","provider":"Montgomery Parts","version":"1.0","type":"link"}