What Does an X-Pipe Do?

An X-pipe merges exhaust pulses from both banks of the engine, creating smoother airflow.

Key Benefits:

• Increased exhaust flow efficiency
• Reduced backpressure
• Smoother, higher-pitched exhaust tone
• Improved turbo response
• Enhanced overall sound character

Product Overview: APR CBK0027

Engineered by APR, this X-pipe is designed for direct compatibility with Audi’s 4.0T platform.

Key Features:

• Designed for 4.0 TFSI twin-turbo engines
• High-quality stainless steel construction
• Precision-engineered X-pipe merge
• Direct bolt-on installation
• Retains factory exhaust routing
• Improves sound without excessive drone

T304 stainless steel building
Argon-again-purged TIG welding all the way through

Vehicle Compatibility (C7 Platform)

Fits Audi models equipped with the 4.0 TFSI engine:

Audi:

• Audi S6 → 2013–2018
• Audi S7 → 2013–2018
• Audi RS7 → 2014–2018

(Includes both pre-facelift and facelift C7.5 models.)

Twin three” to 2.seventy five” mandrel-bent brushed tubing

Sound Profile Upgrade

Installing an X-pipe transforms the exhaust tone:

Before:

• Muted
• Uneven exhaust pulses

After:

• Smoother, more exotic tone
• Increased volume under throttle
• Cleaner high-RPM sound

Perfect for drivers who want better sound without going full catback.

Built-in X-Pipe
Subtle exhaust word

Performance Benefits

While primarily a sound upgrade, the X-pipe also provides:

• Improved exhaust scavenging
• Slight horsepower and torque gains
• Better turbo efficiency
• Reduced turbulence in exhaust flow

Ideal For:

• Audi 4.0T owners wanting better sound
• Stage 1–Stage 3 builds
• Drivers avoiding full exhaust replacement
• OEM+ performance upgrades

Installation Notes

• Direct bolt-on replacement for center section
• Works with stock or aftermarket exhaust systems
• Professional installation recommended
• No ECU tuning required

Frequently Asked Questions

Does this add horsepower?

Yes, minor gains due to improved exhaust flow.

Will this make the car louder?

Yes, but it maintains a refined tone without excessive drone.

Do I need a tune?

No, this is a bolt-on upgrade.

Conclusion

The APR CBK0027 Exhaust X-Pipe is one of the best bang-for-buck upgrades for Audi’s 4.0T platform. It enhances exhaust flow, improves sound quality, and adds a more aggressive character—all while maintaining OEM-level fitment and drivability.