APR Catback Exhaust System for Audi RS3 | CBK0053

The APR Catback Exhaust System (CBK0053) is a world-class upgrade designed to amplify the iconic five-cylinder soundtrack of the Audi RS3. Hand-crafted from premium T304 stainless steel and precision TIG-welded, this system replaces the factory exhaust with a dual 63.5mm (2.5") mandrel-bent path. The straight-through, brushed-finish mufflers are engineered to deliver a deep, aggressive growl while eliminating the rasp and restrictions found in the OEM unit.

A standout feature of this system is the integration of cast valve housings, which allow for the re-use of factory electronic valve actuators. This ensures that you retain full OEM valve operation, allowing the car to remain civil during daily commutes and transform into a visceral performer under wide-open throttle. The quad-exit design feeds directly into the RS3's signature bumper-integrated oval tips for a seamless, factory-plus appearance.

Key Features:

• Premium T304 Stainless Steel: High-grade material and TIG welding ensure maximum durability and a lifetime of performance.
• Retains OEM Valve Function: Plug-and-play cast valve housings allow you to switch between exhaust modes using the factory Audi Drive Select.
• High-Flow Dual Path: Dual 63.5mm (2.5") mandrel-bent tubing provides a smoother, larger path for exhaust gases compared to stock.
• Refined Sound Profile: Straight-through mufflers provide a deep, powerful growl without the high-pitched rasp common in five-cylinder exhausts.
• Precision Fitment: Rugged mounting brackets and OEM-style slip clamps ensure a rattle-free, low-profile install—perfect for lowered cars.
• Discreet Appearance: Designed to exit into the factory RS3 bumper tips, maintaining the classic Audi Sport aesthetic.

Technical Specifications:

Installation Instructions