Audi TTRS (Mk3) Valved Cat-Back Exhaust System 3" T304 Stainless Steel with OEM-Style Electronic Valve Control Overview The five-cylinder soundtrack is iconic—the factory cat-back just keeps it on too short...
3" T304 Stainless Steel with OEM-Style Electronic Valve Control
Overview
The five-cylinder soundtrack is iconic—the factory cat-back just keeps it on too short a leash. The Valvetronic Designs Valved Cat-Back for the Mk3 TTRS increases system diameter to 3 inches for significantly improved flow and a sharper, more characterful note without sacrificing daily comfort.
At the heart of the design is our rear Y-section: straight-through when valves are open for maximum presence, and routed through a quad-chamber center muffler when closed for quiet, refined cruising. The dream exhaust for Audi’s modern 5-cylinder is here.
Why It Works
3" Free-Flow Architecture: Reduces back pressure and unlocks response through the rev range.
Dual-Path Rear Y-Section: Straight-through (open) or muffled (closed) for two distinct personalities.
System Tuning as a Whole: Designed as a cohesive cat-back for consistent tone and perfect fit.
Sound & Control
Valves Open: Uninterrupted flow to the tips—crisp, aggressive 5-cylinder character.
Valves Closed: Gas passes through the quad-chamber center muffler—significantly reduced volume, highway-friendly.
OEM Integration: Uses OEM-style electronically actuated valves; compatible with OEM Audi valve control.
Construction & Quality
Material: T304 stainless steel throughout.
Craftsmanship: Precision TIG welds and fully mandrel-bent tubing.
Weight Savings:14.8 lb lighter than the factory exhaust.
Finish & Tips: Premium tips engineered to complement the TTRS rear bumper.
Fitment
2017–2020 Audi TTRS (Mk3 / 8S)
Installation Notes
Direct bolt-on cat-back; no permanent modifications required.
100% reversible—return to stock at any time.
What’s Included
3" T304 stainless steel valved cat-back system
Quad-chamber center muffler
OEM-style electronic valves
All required clamps and hardware
Specifications
Tubing Diameter: 3" from front to rear
Material: T304 stainless steel
Valves: OEM-style electronic actuation (compatible with OEM control)
