{"product_id":"irl-maxflow-race-400-cell-downpipes-bmw-g80-m3-g82-m4","title":"IRL MaxFlow Race 400 Cell Downpipes BMW G87 M2 \/ G80 M3 \/ G82 M4","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eUpgrade the restrictive factory downpipes on your S58-powered BMW with the IRL MaxFlow 400-Cell High-Flow Catted Downpipes. Featuring \u003cstrong\u003e3-inch tubing and premium 400-cell metallic catalytic converters\u003c\/strong\u003e, the MaxFlow design reduces exhaust backpressure to improve turbocharger efficiency, throttle response, and overall performance while retaining a more refined exhaust character than lower-cell-count or catless downpipes. Improved exhaust flow helps the S58's twin turbochargers spool more quickly and adds a deeper, more aggressive tone without introducing the harshness commonly associated with more extreme downpipe setups. Constructed from \u003cstrong\u003eT304 stainless steel\u003c\/strong\u003e with precision TIG welds, these downpipes are designed for long-term durability and OEM-style fitment. They're also compatible with the factory exhaust and most aftermarket cat-back systems, making them an excellent first step for a street-oriented performance build or supporting modification for a tuned S58. \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eFitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFits \u003cstrong\u003eBMW G87 M2 (S58)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits \u003cstrong\u003eBMW G80 M3\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits \u003cstrong\u003eBMW G81 M3 Touring\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits \u003cstrong\u003eBMW G82 M4 Coupe\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits \u003cstrong\u003eBMW G83 M4 Convertible\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation using OEM mounting locations\u003c\/li\u003e\n\u003cli\u003eCompatible with the \u003cstrong\u003efactory exhaust system\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatible with \u003cstrong\u003emost aftermarket cat-back exhaust systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eECU tuning is not listed as mandatory, but IRL recommends tuning to optimize performance and catalyst efficiency\u003c\/li\u003e\n\u003cli\u003eThe 400-cell design reduces the likelihood of a catalyst-efficiency CEL compared with lower-cell-count options, but \u003cstrong\u003eIRL does not guarantee CEL-free operation\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eNot EPA certified; IRL specifies these downpipes for \u003cstrong\u003eoff-road and motorsport use only where permitted by law\u003c\/strong\u003e \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncluded\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDriver-side IRL MaxFlow catted downpipe\u003c\/li\u003e\n\u003cli\u003ePassenger-side IRL MaxFlow catted downpipe\u003c\/li\u003e\n\u003cli\u003eIntegrated 400-cell metallic catalytic converters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIRL Part Number: \u003cstrong\u003eIRL-G8X-400C\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDownpipe Diameter: \u003cstrong\u003e3 inches\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCatalyst Type: \u003cstrong\u003e400-cell high-flow metallic\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaterial: \u003cstrong\u003eT304 stainless steel\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eConstruction: \u003cstrong\u003ePrecision TIG welded\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eConfiguration: \u003cstrong\u003eHigh-flow catted downpipes\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eInstallation: \u003cstrong\u003eDirect bolt-on\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDesigned for the \u003cstrong\u003eBMW S58 twin-turbocharged engine\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM and most aftermarket exhaust systems \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-cell metallic catalysts\u003c\/strong\u003e provide a strong balance between increased exhaust flow, improved sound, and a more refined character than lower-cell-count alternatives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-inch MaxFlow design\u003c\/strong\u003e reduces backpressure and improves exhaust flow from the S58's twin turbochargers\u003c\/li\u003e\n\u003cli\u003eImproved flow supports \u003cstrong\u003equicker turbo spool, sharper throttle response, and increased horsepower and torque\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduces a deeper performance exhaust note without the excessive harshness commonly associated with more aggressive downpipes\u003c\/li\u003e\n\u003cli\u003ePremium \u003cstrong\u003eT304 stainless steel construction\u003c\/strong\u003e and precision TIG welding provide excellent durability in high-temperature turbocharged applications\u003c\/li\u003e\n\u003cli\u003eOEM-style mounting and compatibility with factory or aftermarket exhaust systems make installation straightforward and future exhaust upgrades easier\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IRL","offers":[{"title":"Default Title","offer_id":53092101062976,"sku":null,"price":1199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/7587\/4624\/files\/IMG-6088.webp?v=1788306705","url":"https:\/\/www.forzamotorworks.com\/products\/irl-maxflow-race-400-cell-downpipes-bmw-g80-m3-g82-m4","provider":"Forza Motor Works","version":"1.0","type":"link"}