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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William Mayfield
Omaha, US
★★★★★ 4
Works good but have only tried it on fine setting.
Works good but should have an overall cap as seasoning gathers around the inside.
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Reviewed in the United States on February 13, 2026
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Ella
Whiting, US
★★★★★ 5
Best S&P grinder set that I have ever used!
Cute chefs cap! Love that they are glass containers with ceramic grinders. Grinds salt granules and pepper corns very finely in both directions. Excellent purchase! Great value!
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Reviewed in the United States on March 9, 2026
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Elizabeth
Lowell, US
★★★★★ 5
Came quickly as described!
The Grinders are very well made. I keep them right next to the stove, so they are used daily. The came quickly. Very easy to fill... You wont be disappointed !
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Reviewed in the United States on April 20, 2026
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Ann Henson
Los Angeles, US
★★★★★ 5
Small and perfect
This salt and pepper grinder set are perfect for what I wanted. They are small in size, easy to fill and grind the S&P perfectly.
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Reviewed in the United States on February 28, 2026
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Anonymous
Draper, US
★★★★★ 5
Great Value!
Color: Tall Set - Black White
Better than anticipated. These are sturdy and work very well. They came with a little funnel to fill, but easy enough without it. They are attractive, I keep on top my stove as I have room. Grind well.
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Reviewed in the United States on December 31, 2025

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