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 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)

• Weight Savings: 14.8 lb vs. OEM

• Design: Dual-path rear Y-section; quad-chamber muffler (valves closed)

Orders are processed same or next business day. Shipping times vary depending on the product, shipping service, and whether freight shipping is required. While we ensure all inventory levels are current and accurate, they can change due to logistics and inventory feeds. Standard shipping typically takes 3-7 business days, but some items may require additional time depending on their origin. Feel free to call us anytime for the latest status of your order.