{"product_id":"valvetronic-designs-valved-sport-exhaust-system-bmw-m3-m4-g80-g82-g83","title":"Valvetronic Designs Valved Sport Exhaust System – BMW M3\/M4 (G80\/G82\/G83)","description":"\u003cstyle\u003e.sl-desc h2{font-size:1.15em;letter-spacing:.06em;text-transform:uppercase;border-bottom:2px solid #111;padding-bottom:6px;margin:1.6em 0 .7em}.sl-desc h3{font-size:1em;margin:1.2em 0 .4em}.sl-desc ul{margin:0 0 1em 1.2em}.sl-desc li{margin:.25em 0}.va-table{width:100%;border-collapse:collapse;margin:.5em 0 1em;font-size:.95em}.va-table th{text-align:left;padding:10px 8px;border-bottom:2px solid #333;white-space:nowrap}.va-table td{padding:8px;border-bottom:1px solid #e5e5e5;vertical-align:top}.sl-note{font-size:.9em;color:#555;margin:.4em 0 1em}\u003c\/style\u003e\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe G80\/G82\/G83 M3 and M4 are phenomenal cars, but the factory exhaust note leaves room to grow. The Valvetronic Designs Valved Sport Exhaust System centers on a single 3.5\" equal-length mid-pipe that unlocks the S58's character without touching the OEM rear section, and pairs with an optional valved axle-back for even more presence and control. The equal-length design balances exhaust pulses for a smoother, higher-frequency tone, while the single 3.5\" mid-section is optimized for improved throttle response and power throughout the rev range. The system is modular by design: it pairs with the OEM or an aftermarket rear section, and the valved axle-back can be added at any time as an upgrade path.\u003c\/p\u003e\n\u003cp\u003eWith the optional valved axle-back installed, a quad-chamber muffler and OEM-style electronic valves deliver daily-driver civility with the valves closed and an aggressive, motorsport edge with them open, controlled electronically via the included controller (OEM drive-mode integration is also available). The system is compatible with OEM downpipes or free-flow front pipes and is engineered to avoid check-engine lights. It is built in T304 stainless steel or ultra-light Grade 5 titanium, with precision TIG welds, fully mandrel-bent tubing, and an included cross brace for rigidity.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTubing diameter: 3.5\" mid-pipe; 2.75\" axle-back\u003c\/li\u003e\n\u003cli\u003eMaterials: T304 stainless steel or Grade 5 titanium\u003c\/li\u003e\n\u003cli\u003eFinish: Brushed (stainless) or raw\/brushed (titanium)\u003c\/li\u003e\n\u003cli\u003eValves: Electronic, with included remote controller; OEM valve-integration available\u003c\/li\u003e\n\u003cli\u003eWeight savings vs. factory: up to −57.8 lb (titanium) or −24.7 lb (stainless)\u003c\/li\u003e\n\u003cli\u003eConstruction: Precision TIG welds, fully mandrel-bent tubing, included cross brace\u003c\/li\u003e\n\u003cli\u003eTips: Premium double-wall or single-wall tips included, per finish selected\u003c\/li\u003e\n\u003cli\u003e100% reversible — return to stock at any time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSingle 3.5\" equal-length mid-pipe assembly\u003c\/li\u003e\n\u003cli\u003eCross brace\u003c\/li\u003e\n\u003cli\u003eValved axle-back with controller and tips (Full System and Axle-Back configurations only)\u003c\/li\u003e\n\u003cli\u003eHardware and clamps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNone.\u003c\/strong\u003e Valvetronic Designs ships this system as a complete bolt-on kit; no additional hardware is required for a basic installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/youtu.be\/0wpjSUXVG2Y\" target=\"_blank\" rel=\"noopener\"\u003eOfficial Valvetronic Designs install guide (YouTube)\u003c\/a\u003e — step-by-step midpipe\/axle-back installation.\u003c\/li\u003e\n\u003cli\u003eMid-pipe and axle-back can be installed independently.\u003c\/li\u003e\n\u003cli\u003eWhen installing only a mid-pipe or axle-back, make the rear-section cut at the second dimple on the OEM pipe to ensure proper fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eV1\/V2 mid-pipe or axle-back components are not compatible with the current V3 system.\u003c\/li\u003e\n\u003cli\u003eThe V3 mid-pipe includes additional clearances at the downpipe connection and mid-section; small visible gaps prior to tightening are normal and by design.\u003c\/li\u003e\n\u003cli\u003ePriced at Valvetronic Designs' direct list price.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW.G8X.M3.VSES.BR.[tip]\u003c\/strong\u003e — Full System Equal Length (Catback), Brushed T304 Stainless Steel — $2,474.99 (tip suffix: RC \/ BRSH \/ BRT \/ BLK \/ FC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW.G8X.M3.VSES.TI.[tip]\u003c\/strong\u003e — Full System Equal Length (Catback), Grade 5 Titanium — $3,824.99 (tip suffix: RC \/ BRSH \/ BRT \/ BLK \/ FC \/ TIBRT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW.G8X.M3.MP.BR\u003c\/strong\u003e — Equal Length Midpipe Only, Brushed T304 Stainless Steel — $1,124.99\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW.G8X.M3.MP.TI\u003c\/strong\u003e — Equal Length Midpipe Only, Grade 5 Titanium — $2,204.99\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW.G8X.M3.AXL.BR.[tip]\u003c\/strong\u003e — Axle-Back Only, Brushed T304 Stainless Steel — $1,979.99 (tip suffix: RC \/ BRSH \/ BRT \/ BLK \/ FC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW.G8X.M3.AXL.TI.[tip]\u003c\/strong\u003e — Axle-Back Only, Grade 5 Titanium — $2,519.99 (tip suffix: RC \/ BRSH \/ BRT \/ BLK \/ FC \/ TIBRT)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003eG80\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L Twin-Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003eG82\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L Twin-Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4 Convertible\u003c\/td\u003e\n\u003ctd\u003eG83\u003c\/td\u003e\n\u003ctd\u003eS58 3.0L Twin-Turbo I6\u003c\/td\u003e\n\u003ctd\u003e2020+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Valvetronic Designs","offers":[{"title":"Full System Equal Length (Catback) \/ Brushed T304 Stainless Steel \/ (4) 1x1 Carbon Fiber (4.0 Outlet)","offer_id":52607320949016,"sku":"BMW.G8X.M3.VSES.BR.RC","price":2474.99,"currency_code":"USD","in_stock":false},{"title":"Full System Equal Length (Catback) \/ Brushed T304 Stainless Steel \/ (4) Brushed Steel (3.5 Outlet)","offer_id":52607320981784,"sku":"BMW.G8X.M3.VSES.BR.BRSH","price":2474.99,"currency_code":"USD","in_stock":false},{"title":"Full System Equal Length (Catback) \/ Brushed T304 Stainless Steel \/ (4) Burnt (3.5 Outlet)","offer_id":52607321014552,"sku":"BMW.G8X.M3.VSES.BR.BRT","price":2474.99,"currency_code":"USD","in_stock":false},{"title":"Full System Equal Length (Catback) \/ Brushed 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