Valvetronic Designs - BMW G80/G82/G83 M3 / M4 Valved Sport Exhaust System
- Description
- Fitment
- Refund Policy
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
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Equal-length design: Balances exhaust pulses for a smoother, higher-frequency tone.
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Single 3.5" mid-section: Optimized flow for improved response and power throughout the rev range.
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Modular by design: Pairs with OEM or aftermarket rear sections; upgrade path to our valved axle-back at any time.
Sound & Control
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With stock downpipes: Noticeably crisper, more engaging tone without drone.
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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.
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No CEL: System is designed to avoid check-engine lights.
Construction & Options
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Materials: T304 stainless steel or ultra-light Grade 5 titanium.
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Weight savings: Up to –57.8 lb (Titanium) or –24.7 lb (Stainless) vs. factory.
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Craftsmanship: Precision TIG welds, fully mandrel-bent tubing, and included cross brace for rigidity.
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Tips: Premium double-wall or single wall tips included.
Valve Integration
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Electronic valve control with included controller for rapid open/close.
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OEM integration available if you prefer factory valve control behavior.
Fitment
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2020+ BMW G80 M3
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2020+ BMW G82 M4 (Coupe)
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2020+ BMW G83 M4 (Convertible)
Installation Notes
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Mid-pipe and axle-back can be installed independently.
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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.
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100% reversible—return to stock at any time.
- CLICK HERE FOR INSTALL GUIDE
Compatibility Notice (V3 Systems)
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V1/V2 components are not compatible with V3.
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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
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Single 3.5" equal-length mid-pipe assembly
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Cross brace
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Optional: Valved axle-back with controller and tips
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Hardware and clamps
Specifications
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Tubing diameter: 3.5" mid-pipe; 2.75" axle-back
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Materials: T304 stainless steel or Grade 5 titanium
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Finish: Brushed (Stainless) or raw/brushed (Titanium)
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Valves: Electronic, with remote controller (OEM integration available)
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
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