The XS-POWER V4 True 3" Tiptronic Downpipe Set is designed for compatible Audi 2.7T twin-turbo vehicles equipped with the larger Tiptronic automatic transmission.

Packaging large-diameter downpipes around the Tiptronic transmission presents different clearance requirements than manual-transmission 2.7T applications. This XS-POWER V4 system is configured specifically for the applicable Tiptronic-equipped Audi 2.7T platform.

The system uses true 3-inch inner-diameter mandrel-bent tubing to provide a large exhaust path immediately downstream of the turbochargers.

The V4 downpipes are constructed from 321 stainless steel and use mandrel-bent tubing to maintain the specified pipe diameter through the bends.

The assembly incorporates precision robotic TIG welds and heavy-duty flex sections as part of the complete downpipe design.

These are straight-through test-pipe downpipes without catalytic converters. Replacing the restrictive factory downpipe/catalyst section with larger-diameter exhaust tubing can substantially reduce exhaust restriction downstream of the turbochargers.

Downpipe upgrades are commonly used as part of tuned Audi 2.7T performance combinations where improved exhaust flow is required.

Customers have reported gains of approximately 40+ wheel horsepower when these downpipes are combined with appropriate ECU/chip tuning and supporting modifications. This is a customer-reported result and is not a guaranteed horsepower increase. Actual results vary by vehicle and complete setup.

TIPTRONIC TRANSMISSION ONLY. These downpipes are designed around the clearance requirements of the applicable Audi 2.7T Tiptronic transmission.

2003-2005 applications are excluded from this fitment because they use a different flange configuration. Verify vehicle year, engine, transmission and existing flange configuration before ordering.

This system uses true 3-inch inner-diameter downpipe tubing, rather than simply describing the outside dimension of the pipe as 3 inches.

The large-diameter downpipe section is intended to provide increased exhaust-flow capacity for modified and tuned 2.7T twin-turbo combinations.

The V4 system incorporates a V-band flange connection for convenient assembly and service.

The supplied mid-pipes neck down to interface with the factory-style sleeve clamps, allowing the system to connect to the applicable factory exhaust configuration while retaining the true 3-inch downpipe sections.

The system includes J-pipe O2 sensor bung spacers for the applicable oxygen-sensor locations.

O2 spacers do not guarantee prevention of a check-engine light. ECU calibration, sensor monitoring and emissions diagnostics vary by vehicle and software configuration.

• XS-POWER V4 Tiptronic-specific downpipe set
• Designed for applicable Audi 2.7T twin-turbo vehicles
• True 3" inner-diameter tubing
• 321 stainless steel construction
• Mandrel-bent tubing
• Precision robotic TIG welds
• Heavy-duty flex sections
• V-band connections
• De-cat / straight test-pipe configuration
• J-pipe O2 sensor bung spacers
• Mid-pipes neck down for factory sleeve-clamp connection

Professional installation is recommended. Before installation, verify the vehicle's engine, Tiptronic transmission, production year and downpipe flange configuration.

Because these downpipes significantly alter the factory exhaust configuration, appropriate ECU calibration may be required depending on the vehicle and intended use.

This product removes the factory catalytic converter section. It is intended for off-road racing or competition applications where permitted. Removal or modification of emissions-control equipment may be prohibited for vehicles operated on public roads. Buyer is responsible for determining compliance with all applicable local, state, provincial and national laws.

The XS-POWER V4 system is designed for enthusiasts searching for an Audi S4 B5 Tiptronic downpipe, Audi 2.7T automatic downpipe, 3 inch Audi S4 downpipes, Audi A6 2.7T Tiptronic downpipes, Allroad 2.7T downpipes, 321 stainless Audi downpipes, B5 S4 test pipes, Audi 2.7 twin turbo downpipes or XS-POWER 2.7T exhaust upgrade.

Unlike generic 2.7T exhaust piping, this version is specifically configured around the packaging requirements of the applicable Tiptronic automatic transmission while providing true 3-inch downpipe sections and a factory-style exhaust connection.