{"product_id":"hfe-bmw-x4m-f97-4-5-decat-downpipes-performance-exhaust-upgrade","title":"HFE BMW X4M F98 4.5″ Decat Downpipes – Performance Exhaust Upgrade","description":"\u003cdiv class=\"product-description\"\u003e\n\u003c!-- Info pills --\u003e\n\u003cdiv style=\"margin: 8px 0 14px; display: flex; flex-wrap: wrap; gap: 8px;\"\u003e\n\u003cspan style=\"background: #111827; color: #fff; padding: 6px 12px; border-radius: 999px; font-size: 12px;\"\u003eHigh Flow Engineering\u003c\/span\u003e \u003cspan style=\"background: #e5e7eb; color: #111827; padding: 6px 12px; border-radius: 999px; font-size: 12px;\"\u003e4.5″ Decat Downpipes\u003c\/span\u003e \u003cspan style=\"background: #e5e7eb; color: #111827; padding: 6px 12px; border-radius: 999px; font-size: 12px;\"\u003ePerformance Exhaust Upgrade\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!-- Short overview --\u003e\n\u003cdiv style=\"border: 1px solid #e5e7eb; border-radius: 12px; padding: 14px 16px; background: #ffffff; margin-bottom: 16px;\"\u003e\n\u003cp style=\"margin: 0;\"\u003eTake exhaust performance on your BMW X4M F98 to the next level with the \u003cstrong\u003eHFE 4.5″ Decat Downpipes\u003c\/strong\u003e. Designed for maximum flow, these oversized downpipes replace the restrictive factory catalytic sections, significantly reducing backpressure and allowing the S58 engine to breathe more freely. This foundation upgrade is ideal for high-power builds, track cars, and serious performance applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- IMPORTANT DISCLAIMER --\u003e\n\u003cdiv style=\"border: 2px solid #dc2626; border-radius: 12px; padding: 14px 16px; background: #fef2f2; margin-bottom: 16px;\"\u003e\n\u003cp style=\"margin: 0 0 6px; font-weight: bold; color: #991b1b;\"\u003e⚠ IMPORTANT – ROAD USE, EMISSIONS \u0026amp; MOT NOTICE\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 14px; color: #111827;\"\u003eThese downpipes remove the factory catalytic converters and are designed for \u003cstrong\u003eoff-road, motorsport, or track use\u003c\/strong\u003e. They are \u003cstrong\u003enot UK emissions compliant\u003c\/strong\u003e and may result in a UK MOT emissions failure. ECU tuning is recommended after installation for optimal performance and drivability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Key Features --\u003e\n\u003cdetails style=\"margin-bottom: 8px; border-radius: 12px; border: 1px solid #e5e7eb; background: #f9fafb; padding: 10px 14px;\"\u003e\n\u003csummary style=\"list-style: none; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600;\"\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003cspan style=\"font-size: 16px;\"\u003e＋\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 14px; color: #111827;\"\u003e\n\u003cul style=\"margin: 4px 0 0 18px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized 4.5″ Diameter:\u003c\/strong\u003e Maximum exhaust gas flow for high-output S58 engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecat Design:\u003c\/strong\u003e Removes the catalytic restriction for freer flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Grade 304 Stainless Steel:\u003c\/strong\u003e Durable, heat-resistant construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMandrel-Bent Tubing:\u003c\/strong\u003e Smooth internal profile for improved flow and reduced turbulence compared to other heavily welded sections on competitors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Turbo Efficiency:\u003c\/strong\u003e Reduced backpressure enhances spool and performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Exhaust Tone:\u003c\/strong\u003e Delivers a deep, aggressive exhaust note.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- Why Upgrade --\u003e\n\u003cdetails style=\"margin-bottom: 8px; border-radius: 12px; border: 1px solid #e5e7eb; background: #f9fafb; padding: 10px 14px;\"\u003e\n\u003csummary style=\"list-style: none; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600;\"\u003e\u003cspan\u003eWhy Choose 4.5″ Decat Downpipes?\u003c\/span\u003e\u003cspan style=\"font-size: 16px;\"\u003e＋\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 14px; color: #111827;\"\u003e\n\u003cul style=\"margin: 4px 0 0 18px;\"\u003e\n\u003cli\u003eFactory downpipes are a major restriction on high-output S58 engines.\u003c\/li\u003e\n\u003cli\u003eOversized 4.5″ design supports extreme power levels and big turbo setups.\u003c\/li\u003e\n\u003cli\u003eReduces exhaust backpressure at high RPM and under load.\u003c\/li\u003e\n\u003cli\u003eEnhances exhaust character and supports track performance builds.\u003c\/li\u003e\n\u003cli\u003eA popular upgrade for Stage 2 and Stage 3+ vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- Technical Specifications --\u003e\n\u003cdetails style=\"margin-bottom: 8px; border-radius: 12px; border: 1px solid #e5e7eb; background: #f9fafb; padding: 10px 14px;\"\u003e\n\u003csummary style=\"list-style: none; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600;\"\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003cspan style=\"font-size: 16px;\"\u003e＋\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 14px; color: #111827;\"\u003e\n\u003cul style=\"margin: 4px 0 0 18px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-grade stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 4.5″ high-flow tubing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Decat (no catalytic converters)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Mandrel bent \u0026amp; welded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Direct replacement for factory downpipes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- Compatibility --\u003e\n\u003cdetails style=\"margin-bottom: 8px; border-radius: 12px; border: 1px solid #e5e7eb; background: #f9fafb; padding: 10px 14px;\"\u003e\n\u003csummary style=\"list-style: none; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600;\"\u003e\u003cspan\u003eVehicle Compatibility\u003c\/span\u003e\u003cspan style=\"font-size: 16px;\"\u003e＋\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 14px; color: #111827;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW X4M:\u003c\/strong\u003e F98 (2019+)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin: 8px 0 0; font-size: 12px; color: #374151;\"\u003e✔ S58 twin-turbo engine only\u003cbr\u003e✔ Compatible with factory or aftermarket exhaust systems\u003cbr\u003e✔ ECU tuning recommended\u003cbr\u003e*Fitment confirmed for X4M – always verify before ordering\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- Installation --\u003e\n\u003cdetails style=\"margin-bottom: 4px; border-radius: 12px; border: 1px solid #e5e7eb; background: #f9fafb; padding: 10px 14px;\"\u003e\n\u003csummary style=\"list-style: none; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600;\"\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003cspan style=\"font-size: 16px;\"\u003e＋\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 14px; color: #111827;\"\u003e\n\u003cul style=\"margin: 4px 0 0 18px;\"\u003e\n\u003cli\u003eRemove the factory downpipes and catalytic sections.\u003c\/li\u003e\n\u003cli\u003eFit the HFE 4.5″ decat downpipes using OEM mounting points.\u003c\/li\u003e\n\u003cli\u003eCheck clearances and alignment before tightening.\u003c\/li\u003e\n\u003cli\u003eECU remapping is strongly recommended before driving.\u003c\/li\u003e\n\u003cli\u003eProfessional installation advised.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"HFE","offers":[{"title":"Default Title","offer_id":56691123618178,"sku":"HFE-S58-DP-X3MX4M","price":495.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9381\/1260\/files\/HFEx3mx4mDownpipeCatlessDecatwithfittingkitandexhaustbolts.webp?v=1767647176","url":"https:\/\/dcprestige.co.uk\/products\/hfe-bmw-x4m-f97-4-5-decat-downpipes-performance-exhaust-upgrade","provider":"DC Prestige","version":"1.0","type":"link"}