Valvetronic Designs Equal Length Valved Exhaust System – BMW F8X M3 / M4

Transform the S55 Sound with True Equal-Length Performance

Unlock the sound the S55 platform was always meant to have with the Valvetronic Designs Equal Length Valved Cat-Back Exhaust System for the BMW F80 M3, F82 M4, and F83 M4. Designed specifically to eliminate the harsh factory rasp and improve tonal depth, this system delivers a smoother, richer, and more exotic exhaust note while retaining the aggressive character enthusiasts expect.

Featuring a 2.75” equal-length mid-section with integrated H-pipe and a 3.5” valved axle-back system, this exhaust provides the perfect balance between refined daily driving and motorsport aggression. With valves open, exhaust gases flow unrestricted for maximum volume and performance. With valves closed, gases are routed through a quad-chamber muffler for a quieter, OEM-like experience.

Available in T304 stainless steel or ultra-lightweight Grade 5 titanium.

Key Features

• Designed for BMW F80 M3, F82 M4 & F83 M4 (S55 Engine)
  
• 2.75” equal-length mid-pipe design for smoother exhaust tone
  
• Integrated H-pipe improves scavenging and sound balance
  
• 3.5” valved axle-back exhaust system
  
• Electronic valve control system included
  
• OEM valve integration optional
  
• Quad-chamber muffler design for refined closed-valve tone
  
• Direct bolt-on installation with OEM mounting points
  
• Available in T304 stainless steel or Grade 5 titanium
  
• Mandrel-bent tubing with precision TIG welds
  
• Multiple premium exhaust tip finish options available

Sound Characteristics

Engineered specifically to improve the S55 exhaust note.

Valves Open:
Aggressive, free-flowing motorsport tone with reduced rasp and improved high-RPM clarity

Valves Closed:
Comfortable, refined sound levels ideal for daily driving

Equal-Length Design Benefits:
Balances exhaust pulses to create a cleaner, smoother, and deeper exhaust tone

Performance Benefits

• Improved exhaust flow and reduced restriction
  
• Enhanced throttle response and turbo efficiency
  
• Improved scavenging through H-pipe integration
  
• Reduced overall system weight

Weight Savings

Stainless Steel System:
Approximately 21.7 lbs lighter than OEM

Titanium System:
Approximately 49.2 lbs lighter than OEM

Construction Options

• T304 Stainless Steel
  • Durable, corrosion-resistant with refined tone
• Grade 5 Titanium
  • Ultra-lightweight with sharper, exotic exhaust note

Installation

• Direct bolt-on installation
• No cutting or welding required
• Fully reversible to stock

Professional installation recommended

Installation available at Sequential Racing – Altona North, Melbourne

Vehicle Fitment

• BMW F80 M3 – 2015–2018
  
• BMW F82 M4 Coupe – 2015–2020
  
• BMW F83 M4 Convertible – 2015–2020

Engine: S55 Twin Turbo Inline-6

Important Notes

• For vehicles running catless or race downpipes, low RPM rasp may still occur during shifts
  
• For the most refined tone, high-flow 200-cell catalytic converters are recommended

What’s Included

• 2.75” Equal-Length H-Pipe Mid-Section
  
• 3.5” Axle-Back Exhaust with Quad-Chamber Muffler
  
• Electronic Valve System & Controller
  
• All Required Hardware & Clamps

Why Choose Sequential Racing?

Sequential Racing supplies premium performance exhaust systems for BMW M and GR platforms, offering proven upgrades with exceptional sound, fitment, and driving experience.

• True equal-length S55 exhaust tone
  
• Premium valved exhaust technology
  
• Available in stainless or titanium construction

Transform your BMW F8X M3 or M4 with the Valvetronic Designs Equal Length Exhaust System and experience the S55 platform with a deeper, smoother, and more refined exhaust note.