SKU: 81977877196

BMW F80/F82/F83 M3/M4 Equal Length Valved Sport Exhaust System

Sale price$1038.15 Regular price$1153.50
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Description

BMW F80/F82/F83 M3/M4 Equal Length Valved Sport Exhaust SystemBMW F8X M3 M4 Valved Cat Back Exhaust System Equal Length 2. 75" Mid Section with H Pipe and 3. 5" Axle Back (T304 Stainless Steel or Grade 5 Titanium) Overview The S55 engine powering the BMW F8X M3 and M4 is a performance masterpiece, but its stock exhaust note has long been criticized for excessive rasp and a lack of tonal depth. The Valvetronic Designs Equal Length Valved Cat Back is the definitive solutioneliminating the factory harshness and


BMW F8X M3/M4 Valved Cat-Back Exhaust System

Equal-Length 2.75" Mid-Section with H-Pipe and 3.5" Axle-Back

(T304 Stainless Steel or Grade 5 Titanium)


Overview

The S55 engine powering the BMW F8X M3 and M4 is a performance masterpiece, but its stock exhaust note has long been criticized for excessive rasp and a lack of tonal depth. The Valvetronic Designs Equal-Length Valved Cat-Back is the definitive solution—eliminating the factory harshness and unlocking the rich, balanced sound the S55 was always capable of producing.

This system features a 2.75-inch equal-length mid-section with an H-pipe feeding into a 3.5-inch axle-back. The equal-length design smooths the exhaust tone across the rev range while preserving the aggressive character owners love. With valves open, gases exit freely from the passenger-side tips for maximum volume and performance. With valves closed, flow is routed through our quad-chamber muffler to the driver-side tips for a quieter, more refined note—ideal for daily driving.

No cutting or welding is required—this is a true direct bolt-on system designed to mount to factory points.


Why It Works

  • Equal-Length Mid-Section: Balances pulses for a cleaner, smoother tone without losing aggression.

  • H-Pipe Design: Improves scavenging for a fuller, more refined sound.

  • Dual-Mode Operation: Raw and loud (open) or subdued and civilized (closed).


Sound & Control

  • Valves Open: Aggressive, free-breathing tone with reduced rasp and improved high-rpm clarity.

  • Valves Closed: Stock-like sound levels for stealthy driving.

  • Electronic Valve Control: Includes standalone controller; OEM integration available.


Construction & Options

  • Materials: T304 stainless steel or Grade 5 titanium.

  • Weight Savings: –21.7 lb (Stainless) / –49.2 lb (Titanium) vs. OEM.

  • Craftsmanship: Precision TIG welds and fully mandrel-bent tubing for maximum flow.

  • Tips: Multiple premium finish options to complement your M3 or M4.


Fitment

  • 2015–2018 BMW M3 (F80)

  • 2015–2020 BMW M4 Coupe (F82)

  • 2015–2020 BMW M4 Convertible (F83)


Installation Notes

  • Direct bolt-on; no cutting or welding required.

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

  • Note for S55 Owners: On free-flow/race downpipes, “2k rpm rasp” may be present during low-rpm shifts. For the most refined tone, we recommend high-flow (200 cell) catalytic converters.


What’s Included

  • 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 necessary clamps and hardware


Specifications

  • 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: –21.7 lb (Stainless) / –49.2 lb (Titanium) vs. OEM

  • Design: Quad-chamber muffler for refined closed-valve tone


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 81977877196

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★★★★★ 3
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The product seems very well made and the adhesive is very strong. These seem like they would work really well if you have two monitors of the same thickness, in my case I did not and they actually created more of a gap then without.
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Reviewed in the United States on January 13, 2026
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★★★★★ 5
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Surprised by the quality of this stand. Exceeded my expectations. Very sturdy and easy to adjust. Expect this to last many years. Looks great on my desk too. Worth every penny. A+
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Reviewed in the United States on April 21, 2026
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jb3
Phoenix, US
★★★★★ 5
Surprisingly Amazing!
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I bought this expecting it to be a cheaper product I would use until I bought something better. I was very surprised to see how nice it was! Very solid and non slip surface on the bottom. The wood on it looks great and one of the most awesome things about it is you can manually adjust it to fit your laptop. I have a heavy16 inch MacBook Pro with a case on it and it fits perfectly in this stand, after adjusting it, of course. I ended up buying another one for my work office too. I can’t wait to try other products from this company.
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Reviewed in the United States on March 29, 2026
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I just received my new Vertical Laptop Stand by UPERGO! I had no idea that this device could free up so much space on my desk! AND, it looks great, very rich & professional with the solid wood, Walnut dividers. It has solid weight so your laptops won't just tumble or slide away either. The dividers that hold up to 2 laptops will also hold your cell phone. What an clever invention by UPERGO! I am now able to keep both of my laptops in the same space which frees up substantial workspace for me. The feature that allows me to adjust the width for different sized laptops is GREAT. I was at wits end how to add ventilation to my laptop as it became so hot. It now runs much, much cooler because the fan/air flow is vertical as opposed to flat on my desk. So many improvements in just one device. Thanks to UPERGO for this fine device which makes my desk look better & so much more functional! I highly recommend to anyone that spends time with laptops at their desk!
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Fennel Salad
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★★★★★ 5
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Color: Walnut, Color: Walnut
The premium quality at this affordable price is a great deal to me. You'd see these sort of designs sold on high-end desk organization companies at expensive ($$) prices. In addition to being aesthetically pleasing, this is a solid laptop stand that was built with the utmost attention to detail. The walnut panels are lined with scratch-resistant felt pads while the aluminum base has a silicone cushion to protect your devices when placing them in. The silicone feet and sturdy weight prevents the stand from moving and tipping over. The adjustability feature is great, especially if you want to accommodate several devices or even books. Per its specifications, I find that it accurately accommodates items ranging from 2cm (0.7in) up to 4cm (1.5in) in width. It fits my 2020 Macbook Air 13" perfectly.
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