TAG Motorsports is pleased to offer the Valvetronic Designs Valved Sport Exhaust System for G80 BMW M3 and G82 / G83 BMW M4 models.

The Valvetronic Designs Cat-Back Sport Exhaust System

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.

Why It Works:

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.

Sound & Control

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.

Construction & Options

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.

Valve Integration

Electronic valve control with included controller for rapid open/close.

OEM integration available if you prefer factory valve control behavior.

Installation Notes

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.

What’s Included

Single 3.5" equal-length mid-pipe assembly

Cross brace

Optional: Valved axle-back with controller and tips

Hardware and clamps

Specifications

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)

Fitment:

- 2020+ BMW M3 / M3 Competition / M3 CS models (G80)
- 2020+ BMW M4 / M4 Competition / M4 CS models (G82 Coupe & G83 Convertible)

About TAG:

TAG Motorsports is proud to be a Valvetronic Designs Dealer, serving customers worldwide.