CTS Turbo C8 Audi RS6/RS7 High-Flow CATS

CTS Turbo's C8 Audi RS6/RS7 high-flow cats drop seamlessly into the restrictive stock catalytic-converter location immediately after the turbocharger.

Built to last, built to fit

CAD-designed to fit perfectly in place of your factory downpipes and manufactured from T304 stainless steel, hand TIG-welded and back-purged for years of reliable service. Expect substantial power gains, improved exhaust flow and a throatier sound.

Product details

• T304 stainless steel construction
• Mandrel-bent stainless steel
• Removable flange for easy installation
• Fully TIG-welded design
• Install hardware included
• OPF/GPF sensor ports (with plugs), bypass factory pressure sensors
• Throaty sound
• Strong power upgrade
• 200-cell race cats

Stage 2 tuning software is required to avoid a check engine light.

Install notes — vehicles without OPF/GPF

• Transfer factory O2 sensors and tighten to 30 ft/lbs
• Install supplied OPF/GPF plugs and tighten to 25 ft/lbs
• Tighten downpipe nuts and bolts to 16 ft/lbs

Install notes — ROW vehicles with OPF/GPF

• Remove the factory pressure sensors and lines from the factory cats
• Connect both ports of the pressure sensor together with the longer factory rubber hose and clamps, then re-install sensors and clip in the harness
• Install OPF/GPF temperature probes and tighten to 25 ft/lbs
• Transfer factory O2 sensors and tighten to 30 ft/lbs
• Tighten downpipe nuts and bolts to 16 ft/lbs

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.