{"product_id":"bmw-f8x-m3-m4-400-cell-catted-downpipes","title":"BMW F8X M3 \/ M4 400 Cell Catted Downpipes","description":"Valvetronic Designs 400-Cell Catted Downpipes for the BMW F80 M3, F82 M4, and M2 Competition are designed to deliver increased performance without sacrificing refinement. Featuring high-flow 400-cell metallic catalysts, these downpipes reduce exhaust restriction while maintaining catalytic functionality.\r\n\r\nThe result is improved turbo response, stronger mid-range pull, and a deeper, more aggressive exhaust tone compared to factory components. Unlike catless systems, the 400-cell design helps retain a more controlled exhaust smell and improved daily usability.\r\n\r\nManufactured from premium stainless steel for long-term durability, these downpipes are engineered for direct bolt-on installation using factory mounting points. Tuning may be required to prevent check engine lights and to maximize performance gains.\r\n\u003cul\u003e\t\u003cli\u003eHigh-flow 400-cell metallic cats\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 installation\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\u003e00810201226402\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\u003e27.5 x 11.75 x 6.5 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e17 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":66757646811181,"sku":"JZYF-BMW.F8X.M2C.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\/F8X_20DPS_20Photo_20Primary.png?v=1779557144","url":"https:\/\/montgomeryparts.com\/products\/bmw-f8x-m3-m4-400-cell-catted-downpipes","provider":"Montgomery Parts","version":"1.0","type":"link"}