The Audi B9 S4 needs a more aggressive tone, which you can easily achieve with the VR Performance titanium catback exhaust! The Valvetronic feature allows for the exhaust to be tame and factory sounding with the valves closed. With the valves open, the exhaust bypasses the muffler resulting in less restriction and a much louder exhaust note

The VR Performance titanium exhaust only weighs 38.72 lbs which is nearly HALF the weight of your factory system. The 3-inch (76mm) diameter tubing throughout the exhaust significantly reduces backpressure. The muffler outlets are 2.5-inch (63.5mm) to allow for a slightly better tone than stock without being too loud.

Features:

• High-quality titanium tubing
• Lightweight 38.72lbs construction
• Beautiful carbon fiber trimmed exhaust tips
• The Valvetronic design allows for tonality change
• Significantly reduced back pressure
• Precision fitment thanks to 3D scanning and CAD modeling
• 3-inch (76mm) diameter mandrel-bent tubing throughout
• 2.5-inch (63.5mm) muffler outlet diameter