{"product_id":"valvetronic-designs-bmw-m3-m4-g8x-midpipe","title":"Valvetronic Designs BMW G80\/G82\/G83 M3 \/ M4 Valved Sport Exhaust System","description":"\u003cp\u003eBMW G80 M3 \/ G82–G83 M4 Exhaust System\u003c\/p\u003e\u003cp\u003eSingle 3.5\" Equal-Length Mid-Pipe + Optional Valved Axle-Back (T304 Stainless or Grade 5 Titanium)\u003c\/p\u003e\u003cp\u003eOverview\u003c\/p\u003e\u003cp\u003eThe G80\/G82\/G83 is a phenomenal M car—its soundtrack just needs to catch up. Our single 3.5\" equal-length mid-pipe unlocks the character the S58 deserves without requiring changes to the OEM rear section. Add the Valvetronic Designs valved axle-back for even more presence and control.\u003c\/p\u003e\u003cp\u003eCompatible with OEM downpipes or free-flow front pipes, this system is engineered to deliver a higher-pitch, refined note with zero check-engine lights.\u003c\/p\u003e\u003cp\u003eSound With Free Flow Downpipes:\u003c\/p\u003e\u003cp\u003eSound With Stock Downpipes:\u003c\/p\u003e\u003cp\u003eWhy It Works\u003c\/p\u003e\u003cp\u003eEqual-length design: Balances exhaust pulses for a smoother, higher-frequency tone.\u003c\/p\u003e\u003cp\u003eSingle 3.5\" mid-section: Optimized flow for improved response and power throughout the rev range.\u003c\/p\u003e\u003cp\u003eModular by design: Pairs with OEM or aftermarket rear sections; upgrade path to our valved axle-back at any time.\u003c\/p\u003e\u003cp\u003eSound \u0026amp; Control\u003c\/p\u003e\u003cp\u003eWith stock downpipes: Noticeably crisper, more engaging tone without drone.\u003c\/p\u003e\u003cp\u003eWith our valved axle-back (optional): Quad-chamber muffler and OEM-style valves deliver daily-driver civility closed, and an aggressive, motorsport edge opened—at the touch of a button.\u003c\/p\u003e\u003cp\u003eNo CEL: System is designed to avoid check-engine lights.\u003c\/p\u003e\u003cp\u003eConstruction \u0026amp; Options\u003c\/p\u003e\u003cp\u003eMaterials: T304 stainless steel or ultra-light Grade 5 titanium.\u003c\/p\u003e\u003cp\u003eWeight savings: Up to –57.8 lb (Titanium) or –24.7 lb (Stainless) vs. factory.\u003c\/p\u003e\u003cp\u003eCraftsmanship: Precision TIG welds, fully mandrel-bent tubing, and included cross brace for rigidity.\u003c\/p\u003e\u003cp\u003eTips: Premium double-wall or single wall tips included.\u003c\/p\u003e\u003cp\u003eValve Integration\u003c\/p\u003e\u003cp\u003eElectronic valve control with included controller for rapid open\/close.\u003c\/p\u003e\u003cp\u003eOEM integration available if you prefer factory valve control behavior.\u003c\/p\u003e\u003cp\u003eFitment\u003c\/p\u003e\u003cp\u003e2020+ BMW G80 M3\u003c\/p\u003e\u003cp\u003e2020+ BMW G82 M4 (Coupe)\u003c\/p\u003e\u003cp\u003e2020+ BMW G83 M4 (Convertible)\u003c\/p\u003e\u003cp\u003eInstallation Notes\u003c\/p\u003e\u003cp\u003eMid-pipe and axle-back can be installed independently.\u003c\/p\u003e\u003cp\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\/p\u003e\u003cp\u003e100% reversible—return to stock at any time.\u003c\/p\u003e\u003cp\u003eCLICK HERE FOR INSTALL GUIDE\u003c\/p\u003e\u003cp\u003eCompatibility Notice (V3 Systems)\u003c\/p\u003e\u003cp\u003eV1\/V2 components are not compatible with V3.\u003c\/p\u003e\u003cp\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\/p\u003e\u003cp\u003eWhat’s Included\u003c\/p\u003e\u003cp\u003eSingle 3.5\" equal-length mid-pipe assembly\u003c\/p\u003e\u003cp\u003eCross brace\u003c\/p\u003e\u003cp\u003eOptional: Valved axle-back with controller and tips\u003c\/p\u003e\u003cp\u003eHardware and clamps\u003c\/p\u003e\u003cp\u003eSpecifications\u003c\/p\u003e\u003cp\u003eTubing diameter: 3.5\" mid-pipe; 2.75\" axle-back\u003c\/p\u003e\u003cp\u003eMaterials: T304 stainless steel or Grade 5 titanium\u003c\/p\u003e\u003cp\u003eFinish: Brushed (Stainless) or raw\/brushed (Titanium)\u003c\/p\u003e\u003cp\u003eValves: Electronic, with remote controller (OEM integration available)\u003c\/p\u003e\u003ch3\u003eManufacturer installation and product references\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/youtu.be\/0wpjSUXVG2Y\" target=\"_blank\" rel=\"noopener\"\u003eManufacturer reference 1\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Valvetronic Designs","offers":[{"title":"FULL SYSTEM EQUAL LENGTH (CATBACK) \/ BRUSHED 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