From the masters of S4 performance, AWE proudly presents the B9 S4 exhaust solution. Signature AWE tone, performance, and options for every taste and budget.

• Max gains of 16 hp and 17 ft-lbs of torque at the crank (exhaust)
• Available as sophisticated Touring Edition, unleashed Track Edition, and valved SwitchPath™
• Touring Edition Exhausts feature AWE's proprietary drone-cancelling solution, 180 Technology®
• SwitchPath™ Exhaust can be controlled with optional handheld remote, or factory valve programming
• Downpipes and precision-engineered x-pipe included in all editions
• Specifically engineered downpipe resonators for use with aftermarket catalysts available separately
• Compatible with standard and sport differentials
• 102mm double-walled tips available in chrome silver or diamond black
• Proudly engineered, designed, and manufactured in-house at AWE, in the USA
• Less is more: clean, straight-through design maximizes performance
• Handcrafted from dual 2.5” CNC mandrel-bent U.S.-sourced .065” wall T304L stainless steel
• Direct bolt-on system, factory-like install simplicity
• Perfect fitment - guaranteed
• No Check Engine Light - guaranteed
• Featuring the AWE Lifetime Exhaust Warranty

Touring Edition Exhaust:

The best just got better.

Signature AWE howl, delivered. The Touring Edition is the sophisticated member of the B9 S4 exhaust family.

The Touring Edition Exhaust removes the factory valving and replaces it with AWE’s 180 Technology® drone-cancelling resonators (and electronic valve simulators). This solution provides for a perfect, signature AWE experience: civil within the cabin while cruising, yet all the pops and burbles during acceleration and downshifts.

The Touring Edition Exhaust comes complete with 180 Technology® resonators, a precision-engineered x-pipe, resonated downpipes, and your choice of 90 or 102mm tips in either diamond black or chrome silver.

As exhaust gases exit the 3.0T engine and flow into an AWE 180 Technology® equipped resonator, they pass through strategically located ports, and into reflection chambers. Sound waves, carried by these exhaust gasses, bounce off the walls of the reflection chambers. By controlling the size and location of the ports and the chambers, we also control when the sound waves exit the chambers.

The specific timing of when the reflected sound waves rejoin the main exhaust flow creates a one-hundred-and-eighty-degree out-of-phase sound wave that cancels out problematic frequencies. Cool, right? Learn more on AWE’s 180 Technology® in the tab above.