Valvetronic Exhaust - BMW G80/G82/G83 M3 / M4 Valved Sport Exhaust System

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Vendor : Valvetronic Designs

Sku : BMW.G8X.M3.VSES.BR.RC

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BMW G80 M3 / G82–G83 M4 Exhaust System

Single 3.5" Equal-Length Mid-Pipe + Optional Valved Axle-Back (T304 Stainless or Grade 5 Titanium)

Overview

The 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.

Compatible with OEM downpipes or free-flow front pipes, this system is engineered to deliver a higher-pitch, refined note with zero check-engine lights.

Sound With Free Flow Downpipes:

Sound With Stock Downpipes:

Why It Works

  • Equal-length design: Balances exhaust pulses for a smoother, higher-frequency tone.

  • Single 3.5" mid-section: Optimized flow for improved response and power throughout the rev range.

  • Modular by design: Pairs with OEM or aftermarket rear sections; upgrade path to our valved axle-back at any time.


Sound & Control

  • With stock downpipes: Noticeably crisper, more engaging tone without drone.

  • With 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.

  • No CEL: System is designed to avoid check-engine lights.

Construction & Options

  • Materials: T304 stainless steel or ultra-light Grade 5 titanium.

  • Weight savings: Up to –57.8 lb (Titanium) or –24.7 lb (Stainless) vs. factory.

  • Craftsmanship: Precision TIG welds, fully mandrel-bent tubing, and included cross brace for rigidity.

  • Tips: Premium double-wall or single wall tips included.

Valve Integration

  • Electronic valve control with included controller for rapid open/close.

  • OEM integration available if you prefer factory valve control behavior.


Fitment

  • 2020+ BMW G80 M3

  • 2020+ BMW G82 M4 (Coupe)

  • 2020+ BMW G83 M4 (Convertible)

Installation Notes

  • Mid-pipe and axle-back can be installed independently.

  • When 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.

  • 100% reversible—return to stock at any time.

  • CLICK HERE FOR INSTALL GUIDE

Compatibility Notice (V3 Systems)

  • V1/V2 components are not compatible with V3.

  • The V3 mid-pipe includes additional clearances at the downpipe connection and mid-section; small visible gaps prior to tightening are normal and by design.

What’s Included

  • Single 3.5" equal-length mid-pipe assembly

  • Cross brace

  • Optional: Valved axle-back with controller and tips

  • Hardware and clamps

Specifications

  • Tubing diameter: 3.5" mid-pipe; 2.75" axle-back

  • Materials: T304 stainless steel or Grade 5 titanium

  • Finish: Brushed (Stainless) or raw/brushed (Titanium)

  • Valves: Electronic, with remote controller (OEM integration available)


All domestic orders will be shipped to the verified billing address associated with the customer’s credit card. In the event that the products need to be shipped to another address, Millaracing will verify the transaction with the customer by requesting a screenshot of our transaction on the customers online banking.

Millaracing strives to ship "In-Stock" orders within 48 hours of receiving the order. Shipping times may vary depending on the contents of your order. Millaracing does not ship partial orders unless requested by the customer, at which time additional shipping charges may apply. If you need your order by a specific date, it is important to contact us by phone so that we may assist you. All dates provided are based on estimates given by the supplier. Millaracing does not guarantee ship dates as delivery times are subject to change. All shipping times are based on our Monday through Friday business hours. Orders will not be shipped from our facility on Saturday or Sunday. Shipping Charges are non-refundable.

International Orders
Please be advised that your country may impose duty fees, or other taxes based on the product origin and/or value. These fees and taxes are based on your country's import policy, and may be imposed in addition to the purchase price and shipping/handling fees collected by us prior to shipment. All such fees and taxes are the sole responsibility of the recipient and any and all charges incurred by Millaracing will be charged to the customer. Millaracing is not responsible for such fees/taxes on returned items. If you are concerned about possible additional charges, please contact your local Import/Customs authority for more information. All charges, sales, returns, and exchanges will be calculated in US dollars. Millaracing is not responsible for fluctuations in currency value. International customers are responsible for understanding their country's international buying laws, and should be aware that all international purchases are subject to additional brokerage, duty or tax fees that are collected at the time of delivery unless otherwise noted by Millaracing. Millaracing is not responsible for these charges as we have no affiliation with tax systems set forth by international countries. If the consignee/receiver refuses to pay these additional charges at the time of delivery, Millaracing will instruct the shipping carrier to abandon the package. Abandoned packages are destroyed at the shipping warehouse at your local pick up facility. Millaracing will not be held responsible for any abandoned packages due to these circumstances.

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If you are missing any products from your order, you MUST notify the CSD within thirty days of receiving the items.

If you fail to report damaged and/or missing items in your shipment within the timeframe outline above, replacement products will not be shipped out under any circumstances. Failure to report missing items from an order before forwarding, re-shipping or transferring the shipment to another location will result in immediate claim denial.

Freight orders are excluded from this policy as it is the responsibility of the recipient to confirm that the goods are in new condition, without damage and that the order is complete before signing for the delivery.

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Millaracing will not provide refunds for any lost package under any circumstances.