BMW G80/G82/G83 M3 / M4 Valved Sport Exhaust System
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...
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)
Shipping Information
Shipping costs vary by product size, weight, and destination. Please call us for shipping details and a quote before placing your order.
📞 Call 913-291-2027
info@americanfusionwheels.com
Free Local Pickup
Local pickup is always FREE at our shop:
American Fusion Wheels
12310 W 62nd Ter, Shawnee, KS 66216
Please wait for a "Ready for Pickup" notification before arriving.
Professional Installation Available
We professionally install everything we sell — wheels, tires, suspension, exhaust, lighting, audio, and more. When you pick up locally or have items shipped to our shop, our experienced technicians handle the installation so everything is done right.
Call us to schedule your installation appointment.
Freight & Large Item Shipping
Wheels, tires, and oversized items typically ship via freight truck.
- Delivery Appointment: The freight carrier will call you to schedule a delivery window.
- Signature Required: An adult must be present to inspect and sign for freight shipments.
- Inspection Policy: You MUST inspect the pallet and items for damage BEFORE signing the delivery receipt. If items are damaged, note the damage on the receipt before the driver leaves, or refuse the shipment.
Contact Us
For shipping questions, call 913-291-2027 or email info@americanfusionwheels.com
At American Fusion Wheels, customer satisfaction is important to us. We strive to ensure you get the perfect fit for your vehicle. Please review our return policy carefully before making a purchase.
15-Day Return Policy
We accept returns within 15 days of the original purchase date under the following conditions:
- Items must be unused, uninstalled, and in brand-new condition.
- Items must be returned in their original packaging.
- All accessories, hardware, and documentation must be included.
- Proof of purchase (receipt or invoice) is required.
Non-Returnable Items
The following items are final sale and not eligible for return:
- Mounted or installed wheels or tires (once a tire is mounted on a wheel, it is considered used).
- Custom-ordered or special-order items (items not kept in our local inventory).
- Clearance, "Open Box," or discounted items.
- Electrical components (TPMS sensors, lighting, etc.).
- Labor, installation, or service charges.
Wheels & Tires Fitment Responsibility
Customers are responsible for confirming proper fitment before purchase.
- American Fusion Wheels is not responsible for returns due to incorrect fitment once items are mounted or installed.
- If you are modifying your suspension (lifting or lowering), fitment requirements may change.
- We strongly recommend contacting our team before purchasing if you are unsure about sizing, offset, or bolt patterns.
Return Shipping & Fees
- Return shipping is the buyer's responsibility — you are responsible for arranging and paying for return shipping.
- A 15% restocking fee will be deducted from your refund.
- Original shipping charges (if any) are non-refundable.
- Returns must be shipped using a trackable shipping method with insurance.
- We are not responsible for items lost or damaged during return shipping.
Damaged or Incorrect Items
If you receive an item that is damaged or incorrect, please contact us within 48 hours of delivery with photos of the item and packaging. Do not attempt to install a damaged or incorrect part, as installation constitutes acceptance of the product. We will work with you to resolve the issue as quickly as possible.
Manufacturer Warranties
Many of the brands we carry offer specific warranties on finishes and structural integrity. If you experience a defect after the 15-day return window, we will gladly assist you in facilitating a warranty claim with the manufacturer.
How to Start a Return
To request a return authorization (RMA), please contact us:
American Fusion Wheels
12310 W 62nd Ter, Shawnee, KS 66216
913-291-2027
info@americanfusionwheels.com
Returns sent without prior authorization (RMA) will be refused.
Refund Processing
- Approved refunds will be issued to the original payment method.
- Refunds are typically processed within 5-7 business days of the item being inspected at our facility.
- The 15% restocking fee will be deducted from your refund amount.
- Shipping and handling charges are non-refundable.
In-Store Purchases
Return eligibility for in-store purchases follows the same policy and must be approved by management. Returns for in-store purchases must be brought back to our Shawnee, KS location.
🏔️
Jeep & Off-Road Specialists
Wrangler & Gladiator builds, lift kits, armor, winches, lockers & regearing
Explore Jeep Builds →Ready to Get Started?
Call us today for a free consultation and quote. Walk-ins welcome!
Proudly Serving the Kansas City Metro
Shawnee • Overland Park • Lenexa • Olathe • Leawood • Prairie Village • Mission • Merriam • Roeland Park • De Soto • Lee's Summit • Blue Springs • Independence • Gardner • Spring Hill • Grandview • Raytown • Liberty • Gladstone • Kansas City KS • Kansas City MO
12310 W 62nd Terrace, Shawnee, KS 66216
Mon-Fri: 9:00 AM - 6:00 PM | Sat: 10:00 AM - 3:00 PM
Phone: 913-291-2027

