Description
About the 2013 Audi S4 Exhaust
The 2013 Audi S4 is the performance trim of the B8 A4 lineup, equipped with the 3.0L Supercharged V6 engine producing 333 horsepower and 325 lb-ft of torque. The S4 exhaust system is more than a luxury sedan exhaust, it is a performance-engineered system tuned for the supercharged V6’s specific power band and the S4’s character as a sport sedan. The system uses dual outlet routing with two mufflers and two tailpipes (or four tips in some packages), delivering the S4’s signature exhaust note that balances refinement with performance.
Why 2013 S4 Owners Replace the Exhaust
The most common 2013 S4 exhaust replacement triggers are: failed catalytic converter (P0420 or P0430 codes, expensive on a supercharged engine), rusted-through muffler or mid-pipe (typical past 8 years in salt-belt states), leaking flange connections, or upgrading to an aftermarket cat-back for better sound and a measurable performance gain. Aftermarket S4 cat-back exhausts typically deliver 10 to 20 hp gain plus a more aggressive supercharger whine through the cabin.
Cat-Back vs Axle-Back vs Full Exhaust on the S4
| Cat-Back System | Replaces everything from the catalytic converter back. Includes mid-pipe, resonator, dual mufflers, and dual tailpipes. The most common upgrade choice for S4 owners. |
|---|---|
| Axle-Back System | Replaces only from the rear axle back. Just the dual mufflers and tailpipes. Less expensive and easier install, smaller sound change. |
| Full Exhaust | Replaces everything from the engine back, including downpipes and catalytic converters. Required when cats are failed. Highest cost. |
Things to Confirm Before Ordering Your S4 Exhaust
- Year (2010 to 2016 B8 S4 share the same exhaust geometry within engine match)
- Body style (Sedan or Avant, where Avant was offered)
- Component scope (complete system, cat-back, axle-back, or individual)
- Tip style preference (dual round, dual oval, quad tip)
- Sound preference (mild factory replacement vs sportier aftermarket tone)
What Is Included, What Is Not Included
| INCLUDED | The exhaust system you order: complete (manifold-back), cat-back (catalytic converter to dual tailpipes), axle-back (dual mufflers and dual tailpipes), or individual component. New gaskets and clamps included. |
|---|---|
| NOT INCLUDED | Heat shields (sometimes included, varies by configuration), engine mounts, oxygen sensors (sold separately), exhaust hangers (typically reuses car’s hardware), tools. |
| Tools You Need | Standard hand tools, oxygen sensor socket, penetrating oil, jack and stands or lift, exhaust hanger removal tool, torque wrench. |
Vehicle Compatibility
The 2013 Audi S4 exhaust system is compatible with the following:
| 2013 Audi S4 Sedan 3.0T quattro | All trim levels |
|---|---|
| 2013 Audi S4 Avant 3.0T quattro | Wagon (where offered) |
| 2010 to 2012 Audi S4 (B8) | Same exhaust geometry, confirm year at order |
| 2014 to 2016 Audi S4 (B8 facelift) | Same exhaust geometry, confirm year at order |
NOT compatible: 2009 and earlier S4 (B7 chassis, V8 engine, different exhaust entirely), 2017 onward S4 (B9 chassis, twin-turbo V6, different exhaust). Also not compatible with regular A4 trims (use the 2014 Audi A4 Exhaust page for those).
Condition and Inspection
This is a new 2013 Audi S4 exhaust system in OEM specification. Quality control includes:
- Stainless steel weld integrity inspection at every joint
- Flange flatness verification on manifold and mid-pipe connections
- Dual catalytic converter substrate inspection (no cracks or melting)
- Both muffler internal baffle integrity check
- Dual tip alignment and chrome finish inspection
- Pressure test on completed dual-system assembly before packaging
This is a new exhaust system, not used. We do not sell used exhausts. New systems only.
Why Buy From Vaz Auto Solutions
- New OEM-specification 2013 Audi S4 exhaust system from established manufacturers
- 3.0T Supercharged engine match confirmed for your S4
- Component scope (cat-back, axle-back, full system) matched to your need
- Dual outlet routing verified for S4-specific configuration
- All components inspected and pressure-tested before shipping
- Free crated freight to all 50 states, no hidden surcharges
- Real human on the phone who knows S4 supercharger and exhaust specifics
- 15 day replacement warranty on manufacturing defects
- Audi performance experienced support team
Brandon T. –
Original muffler started rusting through at 110,000 miles. Vaz confirmed S4-specific dual outlet geometry and shipped the cat-back quickly. Local indy shop installed it in about 3 hours. Stronger supercharger whine, deeper tone under throttle, no drone on highway. S4 sounds and feels exactly how it should.
Marcus K. –
B8 facelift S4, needed a cat-back after the factory mid-pipe rusted from years of mountain road salt. Vaz confirmed cross-compatibility with 2014 S4 and shipped the right unit. Stainless steel construction looks like it will outlast the car. Sound is noticeably better, slight performance bump felt under boost.