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.

Details:

• Brushed T304 stainless steel
• 3 Inch from front to rear
• Weight Savings: 14.8 lb lighter than the factory exhaust.
•  Uses OEM-style electronically actuated valves; compatible with OEM Audi valve control.
• Premium tips engineered to complement the TTRS rear bumper.

What's Included

• 3 Inch T304 stainless steel valved cat-back system
• Quad-chamber center muffler
• OEM-style electronic valves
• All required clamps and hardware

Installation Notes

• Direct Bolt on installation; no permanent modifications required

Features and Components

• 3 Inch 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

Fits

• 2017-2020 Audi TTRS