{"product_id":"bmw-g8x-m3-m4-hfd-midpipe-valvetronic-designs","title":"BMW G8x M3 \/ M4 HFD Midpipe - Valvetronic Designs","description":"\u003ch1\u003ePre Order - ETA 4-8 Weeks \u003c\/h1\u003e\n\u003ch3\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cspan\u003eFree Shipping and Custom Fees To The UK \u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrusted by Enthusiasts. Chosen by Professionals.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eBAF Motorsports is the \u003cstrong\u003elargest Valvetronic Exhaust distributor in the UK\u003c\/strong\u003e, supplying customers nationwide with genuine, high-quality systems and expert advice.\u003c\/p\u003e\n\u003cp\u003eWhen you buy from us, you get:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthentic Valvetronic products\u003c\/strong\u003e — guaranteed quality and performance\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpert support\u003c\/strong\u003e from our in-house motorsport team\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast UK delivery\u003c\/strong\u003e and worldwide shipping available\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation and after-sales care\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWe don’t just sell exhausts, we live and breathe performance.\u003c\/p\u003e\n\u003ch1\u003e\n\u003cbr\u003eBMW G80 M3 \/ G82–G83 M4 HFD Exhaust System\u003c\/h1\u003e\n\u003ch3\u003eHFD Midpipe + Valved Axle-Back Exhaust System (T304 Stainless or Grade 5 Titanium)\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/oS-CmuztqIs?si=piDke7k55yFBaA68\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe BMW G8X platform delivers incredible performance—but the sound still leaves room for improvement. The Valvetronic Designs HFD Exhaust System was developed to completely redefine the S58’s sound profile by combining our High Frequency Development midpipe with our signature valved axle-back system.\u003c\/p\u003e\n\u003cp\u003eHFD, or \u003cstrong\u003eHigh Frequency Development\u003c\/strong\u003e, represents a clean-sheet approach to exhaust engineering focused on optimizing exhaust pulse timing, improving acoustic balance, and creating a smoother, more exotic inline-six tone. Paired with our valved axle-back, this system delivers both refined daily drivability and aggressive performance sound on demand.\u003c\/p\u003e\n\u003cp\u003eDesigned as a complete solution, the HFD Exhaust System enhances tone quality—not just volume—eliminating unwanted rasp and low-RPM harshness while preserving the high-frequency character that makes the S58 come alive.\u003c\/p\u003e\n\u003ch3\u003eSound Clip: HFD Exhaust System (400 Cell Downpipes + HFD Midpipe + Axle-Back)\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/bfymkN7Gb-w?si=ty_upHyNU_F9KASt\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eSound Clip: HFD Exhaust System (Stock Downpipes + Midpipe + Axle-Back)\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/jUTuV-dniAM\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eSound Clip: IRL 3 inch Downpipes + HFD Midpipe + Axleback\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/m9o0HSbxeIQ\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eWhy It Works\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHFD midpipe design:\u003c\/strong\u003e Developed from the ground up to refine exhaust pulse timing and deliver a smoother, higher-quality sound profile.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eValved axle-back system:\u003c\/strong\u003e Provides full control over sound—quiet and refined when closed, aggressive and engaging when opened.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFull system integration:\u003c\/strong\u003e Engineered as a complete exhaust solution to ensure optimal flow, tone, and performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e3-inch midpipe layout:\u003c\/strong\u003e Supports improved exhaust flow and higher-horsepower applications, including hybrid turbo setups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSound \u0026amp; Control\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRefined inline-six tone:\u003c\/strong\u003e Smoother, more exotic sound signature across the entire RPM range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-frequency character:\u003c\/strong\u003e Sharper, more aggressive tone under load without excessive harshness.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eValve control:\u003c\/strong\u003e Switch between comfortable daily driving and full performance sound instantly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReduced rasp:\u003c\/strong\u003e Engineered to eliminate unwanted frequencies common in less-refined systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eConstruction \u0026amp; Options\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e T304 stainless steel \u003cstrong\u003eor\u003c\/strong\u003e ultra-light Grade 5 titanium.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWeight savings:\u003c\/strong\u003e Significant reduction compared to factory system (varies by material).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCraftsmanship:\u003c\/strong\u003e Precision TIG welds, mandrel-bent tubing, and premium construction throughout.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTips:\u003c\/strong\u003e Premium exhaust tips included.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eValve Integration\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eElectronic valve control\u003c\/strong\u003e with included controller for instant adjustment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOEM integration available\u003c\/strong\u003e for factory-style valve operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2020+ BMW G80 M3\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2020+ BMW G82 M4 (Coupe)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2020+ BMW G83 M4 (Convertible)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned as a complete exhaust system for the BMW G8X platform.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProfessional installation is recommended.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSystem is fully reversible.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"G8x Install Guide\" href=\"https:\/\/youtu.be\/0wpjSUXVG2Y\" target=\"_blank\"\u003e\u003cstrong\u003eCLICK HERE FOR INSTALL GUIDE\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHFD midpipe assembly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eValved axle-back exhaust system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eValve controller\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhaust tips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHardware and clamps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTubing diameter: 3.0\" midpipe\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaterials: T304 stainless steel \u003cstrong\u003eor\u003c\/strong\u003e Grade 5 titanium\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eValves: Electronic, with controller (OEM integration available)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Valvetronic Designs","offers":[{"title":"Default Title","offer_id":58094055686525,"sku":"BMW.G8X.M3.HFD.MP.BR","price":1149.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0405\/5649\/5001\/files\/1hfd_png.webp?v=1777291867","url":"https:\/\/www.bafmotorsport.co.uk\/fr\/products\/bmw-g8x-m3-m4-hfd-midpipe-valvetronic-designs","provider":"BAF Motorsport","version":"1.0","type":"link"}