ARM Motorsports Audi 4.0T Catted Downpipes - S6 S7 RS7 A8 S8

The ARM 4.0T Catted Downpipes significantly reduce backpressure, allowing the Audi 4.0T twin-turbo V8 to breathe more efficiently and spool faster. Factory downpipes use large, restrictive catalytic converters that impede exhaust flow and limit power. By replacing them with high-flow 200-cell catted downpipes, your engine experiences improved turbo response, increased low-RPM torque, and smoother power delivery throughout the entire rev range.

The OEM downpipes also cross over from side to side, forcing exhaust gases to travel through tight bends and long paths. The ARM design eliminates these unnecessary directional changes by keeping each downpipe on its correct side, resulting in a shorter, straighter, and more efficient exhaust flow path. The result is quicker spool, improved throttle response, and a noticeably enhanced exhaust tone.

Built from durable SS304 stainless steel, the ARM 4.0T Catted Downpipes are engineered for long-term reliability under high heat and high-boost conditions. Each pipe begins at a robust 4.4" x 3" collector with an OEM-style 5-bolt turbo flange that fits both factory turbos and all known 4.0T turbo upgrades. The system includes an integrated flex section to reduce stress on the turbos during hard acceleration, cornering, or braking, and uses the OEM transmission bracket for secure mounting. A 2.25" 3-bolt flange ensures perfect compatibility with OEM midpipes or ARM upgraded midpipes.

For drivers looking to further enhance sound and performance, pairing these downpipes with ARM 4.0T Midpipes will unlock even more aggressive exhaust characteristics.

Fitment:
• Audi S6 (C7/C7.5) – 4.0T
• Audi S7 (C7/C7.5) – 4.0T
• Audi RS7 (C7/C7.5) – 4.0T
• Audi A8 (D4) – 4.0T
• Audi S8 (D4) – 4.0T