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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.
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.
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.
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.
Electronic valve control with included controller for rapid open/close.
OEM integration available if you prefer factory valve control behavior.
2020+ BMW G80 M3
2020+ BMW G82 M4 (Coupe)
2020+ BMW G83 M4 (Convertible)
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.
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.
Single 3.5" equal-length mid-pipe assembly
Cross brace
Optional: Valved axle-back with controller and tips
Hardware and clamps
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)
Warranty Coverage
All products manufactured by Valvetronic Designs are guaranteed to be free from manufacturing defects in materials and workmanship at the time of sale. A manufacturing defect is defined as any characteristic of the product that arises during the manufacturing process which impairs its usability for the purposes for which it was designed and manufactured.
Products are guaranteed to fit and function as designed on their intended vehicle application, provided the vehicle has not been modified or incurred structural damage. Sound or tone is not a warrantable or returnable issue, as exhaust sound is subjective and not considered a defect.
Warranty Periods
Warranty Terms
FULL WARRANTY POLICY CAN BE FOUND HERE
Overall rating: 4.951807 / 5 from 83 reviews.
This BMW G8x M3/M4 Valved Sport Exhaust System enhances the vehicle's performance and sound quality. Customers appreciate the system's smooth installation, high-quality materials, and the ability to control the sound with the valved axle-back. The exhaust system is compatible with various downpipes and offers a refined note without triggering check-engine lights.
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"Got a SS cat back system. Initially, I had issues with mid-pipe clearance. Had the car sitting in the shop for a few days. Customer service was great in terms of replacing the defective item. However, it is EXTREMELY hard to get a hold of them. With that said, the exhaust sounds great and it's quality item."
"Got a Valvetronic exhaust on my G80 M3 Comp and honestly it changed the whole car. Stock sound was kinda weak, but now it actually sounds like an M car. Valves open = loud, aggressive, pops nice on downshifts. Valves closed = pretty chill for daily driving, which I like. Fitment was clean, quality feels solid, no issues so far. Cold starts are a bit loud but nothing crazy. Overall, super happy with it. Makes the car way more fun to drive."
"The service. The packaging. The delivery. The ease of install. Oh, and did I mention the sound! Truly, the best exhaust out there. Full system, titanium. 4 inch exhaust tips. Bad ass."
"Truly sounds amazingly and videos do not give it justice!"
"My son has been running the M4 Comp Valvetronic Full Exhaust System on his car for a few weeks now, and he absolutely loves it. The exhaust note is aggressive when you want it, but what really stands out — and what I appreciate as well — is the valvetronic feature that lets him turn the valves off when a quieter drive is needed. It’s great for daily driving and still awesome when he wants to open it up. Overall, it sounds fantastic, performs well, and the added control makes it a winner for us."
"Sounds really good in person and it wasn’t too hard to install"
"When it comes to enhancing your vehicle's performance and sound, performance exhaust mufflers are a must-have. They not only improve the engine's sound but also boost horsepower, torque, and overall efficiency. Purchase two different exhaust system with Valvetronic Design both were worth it. Quick delivery as well."
"When I was getting my exhaust installed I had to bend some pipes open where u would insert the mid pipe to the muffler I got the whole system so I thought I wouldn’t but wtvr other then that perfect"
"Best sounding exhaust in the Galaxie!"
"The quality, the sound, the quality of the welds is by far the best design exhaust I have ever had on any of my vehicles. Fast shipping, well packaged, and quality parts. Job well done Valvetronic team"
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