{"product_id":"bmw-3-4-5-series-catless-downpipe-b58-3-0t-g20-g22-g30-2018-2023-wstn-performance","title":"BMW M340i\/M440i\/M240i Catless Downpipe 2019-2023 | WSTN Performance (B58 G20\/G22\/G42)","description":"\u003ch1 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eOne downpipe. Every restriction the B58 was born to lose.\u003c\/h1\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe B58 is one of BMW's finest engines the inline-six that powers the M340i, M440i, and M240i across the G-series platform. Smooth, linear, and deeply tuneable, it's held back from the factory by a single choke point: the OEM downpipe. This WSTN Performance Catless Downpipe replaces it with a straight-through 304 Stainless Steel unit free-flowing, mirror polished, and built to unlock what the B58 is genuinely capable of. Built to order, quality checked in Perth, dispatched worldwide.\u003c\/p\u003e\n\u003ch1 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eWhy Upgrade?\u003c\/h1\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✅ \u003cstrong\u003eMaximum Flow Gain:\u003c\/strong\u003e Straight-through catless construction eliminates the factory catalytic restriction the single highest-impact exhaust modification on any B58.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✅ \u003cstrong\u003eSharper Turbo Response:\u003c\/strong\u003e Remove the bottleneck at the turbo outlet and feel the difference in spool speed and mid-range pull.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✅ \u003cstrong\u003eTune-Ready:\u003c\/strong\u003e Pairs perfectly with any ECU tune this is the modification that allows your software to deliver its full potential.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✅ \u003cstrong\u003e304 Stainless Steel: \u003c\/strong\u003emirror polished inside and out premium finish that holds up to heat and time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✅ \u003cstrong\u003eDirect Bolt-On:\u003c\/strong\u003e Replaces the OEM downpipe at factory flange points. No cutting, no welding, no fabrication.\u003c\/p\u003e\n\u003ch1 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eKey Features \u0026amp; Specs\u003c\/h1\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 Stainless Steel built for sustained high-heat performance\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eConstruction:\u003c\/strong\u003e Precision mandrel-bent, TIG-welded joints\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eType: \u003c\/strong\u003eCatless straight-through maximum exhaust flow\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eFinish: \u003c\/strong\u003eMirror polished stainless clean, premium look inside and out\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eFitment: \u003c\/strong\u003eDirect bolt-on to factory turbo outlet and mid-pipe flanges\u003c\/p\u003e\n\u003ch1 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eFitment \u0026amp; Compatibility\u003c\/h1\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✔️ BMW M340i \u0026amp; M340i xDrive (G20\/G21) 2019–2023 (B58, 3.0T)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✔️ BMW M440i \u0026amp; M440i xDrive (G22\/G23\/G26) 2020–2023 (B58, 3.0T)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✔️ BMW M240i \u0026amp; M240i xDrive (G42) 2021–2023 (B58, 3.0T)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e✔️ BMW X5 40i \u0026amp; X5 40i xDrive (G05) 2019–2023 (B58, 3.0T)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e⚠️ Not compatible with OPF\/GPF-equipped cars. Most Australian-delivered cars are non-OPF confirm your build spec before ordering. If unsure, contact us with your VIN.\u003c\/p\u003e\n\u003ch1 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eWhat's In the Box\u003c\/h1\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e1 x WSTN Performance Catless Downpipe\u003c\/p\u003e\n\u003ch1 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eInstallation\u003c\/h1\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e 3\/5 Requires workshop lift and exhaust experience\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTime Estimate: \u003c\/strong\u003e1.5–2.5 Hours\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Direct bolt-on to factory turbo outlet and mid-pipe flanges\u003c\/p\u003e\n\u003ch1\u003eWarranty \/ Shipping\u003c\/h1\u003e\n\u003ch3\u003eDISCLAIMER\u003c\/h3\u003e\n\u003cp\u003eWSTN Performance components are designed for track and competition use. To protect your build and ensure a perfect finish, we recommend professional installation by a certified specialist\/workshop. It is the buyer's responsibility to ensure modifications comply with local regulations.\u003c\/p\u003e\n\u003ch3\u003eWARRANTY\u003c\/h3\u003e\n\u003cp\u003eWe stand behind every product we sell. All WSTN Performance products carry a 1 year WSTN Performance warranty as standard. This covers any manufacturing defects, giving you total peace of mind that your upgrade is built to last. \u003ca href=\"\/policies\/refund-policy\"\u003eView our full Warranty policy page here.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eSHIPPING\u003c\/h3\u003e\n\u003cp\u003eWe offer tracked worldwide shipping on our entire catalogue. Most of our products are built-to-order: hand-crafted to your engine code, personally quality-checked in Perth WA, and dispatched worldwide. In-stock items dispatch within 2–4 days. All items arrive with full tracking. \u003ca href=\"\/policies\/shipping-policy\"\u003eView our full Shipping policy page here.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eRETURNS\u003c\/h3\u003e\n\u003cp\u003eWe offer returns on all products if items are damaged or there is something wrong. If we ever make a mistake, we'll cover the return shipping to make it right. \u003ca href=\"\/policies\/refund-policy\"\u003eView our full Return policy page here.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eSUPPORT\u003c\/h3\u003e\n\u003cp\u003eNeed a hand with fitment, shipping, or a return? Our Perth-based team is here to help you get your build perfect.\u003cbr\u003eEmail: \u003ca href=\"mailto:contact@wstnperformance.com\"\u003econtact@wstnperformance.com\u003c\/a\u003e\u003c\/p\u003e\n\u003ch1\u003eSound Clip\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"WSTN Performance","offers":[{"title":"Default Title","offer_id":50164484636918,"sku":"WSTN-BMW-G20-G21-G22-DP","price":495.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/2955\/2886\/files\/product_1_35bfa00d-fa6f-4d6a-b90f-c9c337174393.jpg?v=1774783537","url":"https:\/\/wstnperformance.com.au\/products\/bmw-3-4-5-series-catless-downpipe-b58-3-0t-g20-g22-g30-2018-2023-wstn-performance","provider":"wstnperformance","version":"1.0","type":"link"}