CTS Turbo Audi C7/C7.5 S6/S7/RS7 4.0T Cast Downpipe Set with High Flow Cats

CTS Turbo's cast stainless steel downpipe set with high-flow cats for the C7 4.0T platform (S6/S7/RS7) is a bolt-on path to more performance. It eliminates the OEM crossover and includes the O2 sensor harness extensions.

Unrestricted flow

A CAD-engineered cast stainless steel collector feeds unrestricted flow, with 3" piping running all the way back to the exhaust connection and a taper to OE fitment for direct connection to factory or aftermarket cat-back systems.

Product details

• Cast stainless steel collectors
• Heat shielding to keep temperatures down
• 3" stainless pipes with sleeve clamps for easy install and maximum flow
• Taper to OE fitment for factory or aftermarket cat-back systems
• TIG welded
• High-flow 200-cell metallic catalytic converters to reduce flow restriction
• Includes O2 sensor harness extensions
• Includes installation hardware (downpipe gaskets not included)

We recommend new OEM gaskets for a headache-free install (part number 4G0253115D, 2 required). Stage 2 software tuning is required to remove the CEL — check with your tuner.

Fitment

• 2013-2018 C7/C7.5 Audi S6 4.0T
• 2013-2018 C7/C7.5 Audi S7 4.0T
• 2014-2018 C7/C7.5 Audi RS7 4.0T

Emissions disclaimer: This product is not legal for sale or use on pollution-controlled vehicles operated on public roads and is intended for off-road, race, or closed-course competition use only. You are responsible for compliance with all applicable emissions laws; use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state 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.