CTS TURBO B8 S4 CATBACK

CTS Turbo's B8 S4 cat-back is built by enthusiasts for enthusiasts, hand TIG-welded from the finest T304 stainless steel. Each system is 100% TIG-welded from T304 seamless stainless steel and includes installation hardware and stainless clamps — no seamed tubing that can crack and decay over time. It sharpens throttle response and peak power.

Product details

• True stainless steel cat-back exhaust
• Aggressive under hard driving, subtle when cruising
• CNC mandrel-bent stainless steel piping
• Polished stainless steel exhaust tubing
• 3" stainless steel exhaust tips
• Fits manual and DSG transmissions
• Aftermarket cross/underbraces may require spacers for clearance

A note on the SoundAktor

From 2012, Audi added a SoundAktor system: a speaker near the base of the windshield that produces a fake intake sound (active in Dynamic mode), plus synthesized sounds through the stereo. To disable it, remove fuse number 5 on block A of the driver-side fuse box — this disables the system without a check engine light or faults (labeled "Sound actuator/exhaust sound tuning" in the owner's manual; consult your manual for fuse location). On cars equipped with SoundAktor we strongly recommend removing this fuse or disabling it via VAGCOM when installing this exhaust.

Fitment

• 2010-2016 B8/B8.5 Audi S4 3.0T supercharged (with or without sport diff)

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.