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The S55 engine in the M2 Competition and M2 CS delivers exceptional performance, but its stock exhaust note leaves much to be desired—buzzy, raspy, and lacking the refined aggression enthusiasts expect. The Valvetronic Designs Equal-Length Valved Cat-Back Exhaust System solves this problem, unlocking the hidden character of the S55 while preserving the excitement and volume owners crave.
This system combines a 2.75-inch equal-length mid-section with an H-pipe and a 3.5-inch axle-back, delivering a smoother, richer tone across the rev range. With valves open, exhaust gases exit freely through the passenger-side tips for maximum presence. With valves closed, gases are routed through our quad-chamber muffler and driver-side tips, offering a quieter, more refined sound—perfect for daily driving.
Direct bolt-on fitment means installation is seamless, mounting to factory points without permanent modifications.
Equal-Length Mid-Section: Balances exhaust pulses for a smoother, more pleasant tone without sacrificing aggression.
H-Pipe Integration: Improves exhaust scavenging for a fuller, richer sound.
Dual Sound Modes: Enjoy raw, motorsport tone (open) or comfortable refinement (closed).
Valves Open: Aggressive, free-flowing tone with improved top-end character.
Valves Closed: Stock-like volume and tone for discreet driving.
Electronic Valve Control: Includes remote controller; OEM valve integration optional.
Materials: T304 stainless steel or Grade 5 titanium.
Weight Savings: –20.9 lb (Stainless) / –47.3 lb (Titanium) compared to OEM.
Craftsmanship: Precision TIG welds, fully mandrel-bent tubing.
Tips: Premium tips available in multiple finishes to match your style.
2018+ BMW F87 M2 Competition
2020 BMW M2 CS
Direct bolt-on installation to OEM mounting points.
100% reversible—return to stock at any time.
Note for S55 Owners: On race or free-flow downpipes, “2k rpm rasp” may be present during low-rpm shifts. For the most refined tone, we recommend high-flow (200 cell) catalytic converters.
2.75" equal-length H-pipe mid-section
3.5" axle-back with quad-chamber muffler
Electronic valve system with controller (OEM integration optional)
All required clamps and hardware
Mid-Section Diameter: 2.75" equal-length with H-pipe
Axle-Back Diameter: 3.5"
Material: T304 stainless steel or Grade 5 titanium
Valves: Electronic, rapid open/close
Weight Savings: –20.9 lb (Stainless) / –47.3 lb (Titanium) vs. OEM
Design: Quad-chamber muffler for refined closed-valve tone
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
Overall rating: 5.0 / 5 from 7 reviews.
Review topics: [].
"Fitment was good, and the install was super straightforward. It only took a few hours to completely remove the stock exhaust and install this one. The weaved carbon fiber tips fit the best. Everything to make the stock valves and OEM valve controlling is included. Not really much to complain about to be honest. If installing yourself, make sure to get all of the connections pushed into each other as much as possible."
"Install was simple and the sound is incredible with the valves open. Valves closed is perfect for early mornings when I don’t want to bother my neighbors before work."
"Absolutely blown away. The Valvetronic Equal Length Exhaust for my F87 M2 Comp is easily the best mod I’ve done. It genuinely transformed the sound. Exotic, clean, and aggressive without being obnoxious. Cold starts are pure music, and the tone at higher RPMs feels like something you’d hear from a GT3 or supercar. The build quality is top-notch, and the valved system works perfectly. I was hesitant at first, but now I’d recommend it to any M2 owner looking to unlock the full character of the car. 10/10."
"Truly opens up the car a lot. Sounds amazing especially when you hit the higher rpm’s. Can’t complain it’s all smiles when I drive"
"So, buying exhaust for my 2021 M2 Comp is a big deal financially so I studied and went with the catback Equal Length Sport system. I installed it yesterday and had super high expectations. Those were blown out of the water once I got in and drove. The cacophony of sounds coming from this otherwise tame car are outrageous and glorious. I use words for a living and I cannot find a way to adequately describe my happiness. The grin on my face won't go away. I had to take my car-loving wife for a drive last night just so she could hear it. She was laughing at me the entire time because I was acting like a kid. Anyhow, I cannot recommend this system enough to anyone who wants to make the fabulous M2 Comp sound like an untamed supercar. The ONLY thing I'd suggest is the option for black clamps near the tip so they are less visible. I'm probably going to paint mine. THANK YOU for creating a reasonably affordable masterpiece."
"Absolutely recommend! Everyone loves it, including my local BMW dealership! They complimented it right away after I had this system installed!"
"Fantastic exhaust system! I love the way my titanium equal length sounds."
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