Catless Downpipes For Audi S6/ S7/ RS6/ RS7 C7 4G 4.0 TFSI QUATTRO

High-Velocity Flow: Catless Downpipes for the Audi 4.0 TFSI V8 Engine

Who It’s For: Engineered for Audi S6, S7, RS6, and RS7 owners running the 4.0 TFSI powerplant who are ready to eliminate the primary bottleneck in their exhaust tract and let the twin-turbos breathe.

The Symptom: The factory downpipes on the 4.0 TFSI are designed for extreme emissions compliance and cabin silence, which comes at the cost of performance. The stock units feature dense, restrictive catalytic converters positioned immediately after the turbo chargers. This creates a massive heat soak issue and high backpressure, which physically slows down the turbine wheel rotation and creates a sluggish feeling during low-end acceleration.

The Engineering Fix: This system replaces those restrictive heavy-duty ceramics with a high-flow, catless mandrel-bent 304 stainless steel design. By removing the obstruction directly at the turbo discharge, we significantly decrease the pressure differential across the turbine. This allows the turbos to spool much earlier in the RPM range, while the smooth, TIG-welded transitions ensure that exhaust gas velocity remains high as it exits the engine bay. The result is a sharper throttle snap and a raw, mechanical V8 growl that the stock 4G chassis lacks.

Why Mechanics Choose This Kit

• Optimized Turbo Spool: Reducing backpressure allows the 4.0 TFSI turbos to reach target boost faster, significantly improving 0-60 times and mid-range passing power.
• Thermal Management: By removing the restrictive factory cats, you move heat away from the turbochargers and cylinder heads more efficiently, reducing the risk of heat soak during spirited driving.
• Precision Construction: Built from 100% mandrel-bent T304 Stainless Steel with laser-cut flanges that align perfectly with the factory Audi 4.0L exhaust studs and mounting points.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 2012-2017 Audi S6 (C7/4G) 4.0 TFSI
• 2012-2017 Audi S7 (C7/4G) 4.0 TFSI
• 2013-2017 Audi RS6 (C7/4G) 4.0 TFSI
• 2013-2017 Audi RS7 (C7/4G) 4.0 TFSI

Interchange Part Numbers:

C7-4G-4.0TFSI-DP, AUDI-40-QUATTRO-CATLESS

The Performance Promise

Buy with confidence. These downpipes are designed for enthusiasts who demand better airflow and a more aggressive exhaust note. Note: This kit is intended for off-road use only as it removes the factory emissions equipment. Backed by real automotive experts and fast shipping.