{"product_id":"bmw-m5-downpipes-f90-s63-4-4tt-2018-2023-wstn-performance","title":"BMW M5 Catless Downpipes 2018-2023 | WSTN Performance (S63 F90)","description":"\u003cdiv class=\"wstn-product\"\u003e\n\u003ch1\u003e600 horsepower deserves an exhaust system to match.\u003c\/h1\u003e\n\u003cp\u003eThe BMW M5 F90 is a statement 600hp from a 4.4-litre twin-turbo V8, contained in a car that can collect the kids from school. But the factory exhaust system is still a compliance piece. This WSTN Performance Catless Downpipe set eliminates the single largest restriction in the exhaust path, unlocking sharper turbo response, improved high-RPM pull, and an exhaust note that does the S63 engine genuine justice. Precision-fabricated from stainless steel with integrated heat shielding, these downpipes are built for the demands of performance driving. Built to order, quality checked in Perth, dispatched worldwide.\u003c\/p\u003e\n\u003ch1\u003eWhy Upgrade?\u003c\/h1\u003e\n\u003cp\u003e✅ Dual Turbo Efficiency: Straight-through design eliminates catalytic restriction at both turbo outlets the highest-impact upgrade for the twin-turbocharged S63.\u003c\/p\u003e\n\u003cp\u003e✅ Heat Shield Integrated: Factory-spec heat shielding included protects surrounding components during sustained high-performance driving.\u003c\/p\u003e\n\u003cp\u003e✅ Sharper Mid-Range Response: Reduced back pressure sharpens turbo spool across the RPM range. More torque, faster.\u003c\/p\u003e\n\u003cp\u003e✅ Stainless Steel Construction: Precision TIG-welded stainless steel engineered for heat cycles, corrosion, and the demands of a 600hp V8.\u003c\/p\u003e\n\u003cp\u003e✅ Direct Bolt-On Fitment: Replaces factory downpipes at OEM flange points no fabrication, no modification required.\u003c\/p\u003e\n\u003ch1\u003eKey Features \u0026amp; Specs\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel corrosion resistant, built to last\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConstruction:\u003c\/strong\u003e Precision mandrel-bent, TIG-welded joints\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Catless straight-through maximum flow\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeat Shield:\u003c\/strong\u003e Integrated heat shielding included\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Dual downpipe set left and right\u003c\/p\u003e\n\u003ch1\u003eFitment \u0026amp; Compatibility\u003c\/h1\u003e\n\u003cp\u003e✔️ BMW M5 (F90) 2018–2023 (S63, 4.4L Twin-Turbo V8)\u003c\/p\u003e\n\u003cp\u003e✔️ BMW M5 Competition (F90) 2018–2023 (S63, 4.4L Twin-Turbo V8)\u003c\/p\u003e\n\u003cp\u003eFits both standard M5 and M5 Competition F90 variants. Direct bolt-on to factory turbo outlet flanges. No modification required.\u003c\/p\u003e\n\u003ch3\u003eTechnical Note\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEmissions:\u003c\/strong\u003e Catless straight-through intended for track and competition use. Buyer is responsible for local emissions compliance. Check applicable regulations before fitting to road-registered vehicles.\u003c\/p\u003e\n\u003ch1\u003eWhat's In the Box\u003c\/h1\u003e\n\u003cp\u003e1 x WSTN Performance Downpipe Set (Left + Right) with Heat Shields\u003c\/p\u003e\n\u003ch1\u003eInstallation\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e 4\/5 Requires workshop lift, specialist exhaust tools, and S63 engine familiarity\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTime Estimate:\u003c\/strong\u003e 2.5–4 Hours\u003c\/p\u003e\n\u003cp\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\u003c\/div\u003e","brand":"WSTN Performance","offers":[{"title":"Default Title","offer_id":50164369096950,"sku":"WSTN-BMW-F90-DP","price":1000.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/2955\/2886\/files\/product_1_33cb1f16-5f12-4b04-9efb-4680e619d1e1.jpg?v=1774680473","url":"https:\/\/wstnperformance.com.au\/products\/bmw-m5-downpipes-f90-s63-4-4tt-2018-2023-wstn-performance","provider":"wstnperformance","version":"1.0","type":"link"}