CTS Resonator Delete Kit - B9 Audi S4 3.0T

Add a deeper, more purposeful note to your B9 Audi S4 3.0T with the CTS Resonator Delete Kit. Based on the factory Audi part, it swaps the stock resonator on your factory cat-back assembly for a high-flow section — giving you the sound upgrade without the price of a full exhaust, and without adding drone.

Features

• Replaces the factory resonator on the stock cat-back exhaust with a high-flow section
• Adds a deep exhaust note without replacing the entire system
• More sound with no added drone
• Durable T304 stainless steel
• Stainless steel exhaust band clamps included
• Installs quickly with simple hand tools and is fully reversible
• Does not void warranty or cause a check engine light

Fitment

• 2017-2021 B9 Audi S4

Compatible with factory and aftermarket downpipes, but for factory cat-back exhaust only — it does not fit aftermarket exhaust systems.

Emissions disclaimer: This product is intended for off-road, race, or closed-course competition use only and is not legal for use on pollution-controlled vehicles operated on public roads in most states and provinces. You are responsible for compliance with all applicable emissions laws. Please check your local laws before purchase and installation.

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.