European Wholesale Parts

2010-2016 Audi S4 exhaust systems

57 exhaust systems for the B8 2010-2016 Audi S4 (3.0T supercharged V6) from 14 brands. Cat-back and axle-back systems, mufflers, tips and valve controllers. A cat-back replaces the exhaust from the catalytic converter rearward. An axle-back replaces only the rear section.

Before you order

Fitment is listed by engine and drivetrain. Confirm both on the retailer page.
Tip finish and size are often a separate selection on the retailer page.
Sound-level rules vary by state. A louder system can fail an inspection or roadside check.
Listings are read from the retailer's B8 and B8.5 S4 (3.0T, quattro) category. Confirm engine, drivetrain and model year on the retailer page before ordering.

Brands on this page: Milltek Sport (16), Valvetronic Designs (12), ECS (10), Armytrix (5), AWE (2), Doorbusters (2), Scorpion (2), Supersprint (2), 034Motorsport (1), Borla (1), CTS (1), Enthusiast Bundles (1), Integrated Engineering (1), Magnaflow (1).

Cat Back (33)

AWE · Part no. AWEB8S4TR
AWE Touring Edition Exhaust System - B8/B8.5 S4 3.0T
Remarkably civil while idling/part throttle cruising, but unleashed at full throttle produces what some have called a “war-cry wail.” Features AWE's proprietary 180 Technology® resonators.
Check price at ECS Tuning for AWE AWE Touring Edition Exhaust System - B8/B8.5 S4 3.0T (opens the retailer site)
AWE · Part no. AWEB8S4TK
AWE Track Edition Exhaust System - B8/B8.5 S4 3.0T
Equipped with the same precision-engineering as its Touring Edition counterpart, minus the 180 Technology® resonators in the rear.
Check price at ECS Tuning for AWE AWE Track Edition Exhaust System - B8/B8.5 S4 3.0T (opens the retailer site)
Armytrix · Part no. AUBS4-QS11B
ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Blue Coated Tips
Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!
Check price at ECS Tuning for Armytrix ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Blue Coated Tips (opens the retailer site)
Armytrix · Part no. AUBS4-QC11
ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Carbon Tips
Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!
Check price at ECS Tuning for Armytrix ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Carbon Tips (opens the retailer site)
Armytrix · Part no. AT-AUBS4-QS11C
ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Chrome Silver Tips
Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!
Check price at ECS Tuning for Armytrix ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Chrome Silver Tips (opens the retailer site)
Armytrix · Part no. AUBS4-QS11G
ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Gold Tips
Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!
Check price at ECS Tuning for Armytrix ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Gold Tips (opens the retailer site)
Armytrix · Part no. AUBS4-QS11M
ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Matte Black Tips
Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!
Check price at ECS Tuning for Armytrix ARMYTRIX Stainless Steel Valvetronic Catback Exhaust System - Quad Matte Black Tips (opens the retailer site)
Borla · Part no. 140403
Performance Cat-Back Exhaust System
2.5" stainless steel with quad 3.5" polished stainless tips
Check price at ECS Tuning for Borla Performance Cat-Back Exhaust System (opens the retailer site)
CTS · Part no. CTS-EXH-CB-0015
Cat-Back Exhaust System
2.5" stainless steel with quad 3" polished stainless tips
Check price at ECS Tuning for CTS Cat-Back Exhaust System (opens the retailer site)
Doorbusters · Part no. 008553ECS03DBKT
Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust - With Kohlefaser Luft-Technik Intake System
Enhance the sound and performance of your S4 with an ECS Tuning cat-back and a Kohlefaser Luft-Technik Intake System
Check price at ECS Tuning for Doorbusters Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust - With Kohlefaser Luft-Technik Intake System (opens the retailer site)
ECS · Part no. 008553ECS01KT
Audi B8/8.5 S4 Valved Exhaust System - Resonated With 4" Chrome Swivel Tips
ECS evolutionary design and manufacturing, blending with raw emotion, desire and passion, creating a truly unique driving experience
Check price at ECS Tuning for ECS Audi B8/8.5 S4 Valved Exhaust System - Resonated With 4" Chrome Swivel Tips (opens the retailer site)
ECS · Part no. 008553ECS01
Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Stainless
Experience your driving passion with our ECS Valved Exhaust System and control your sound with our valved muffler design
Check price at ECS Tuning for ECS Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Stainless (opens the retailer site)
ECS · Part no. 008553ECS03
Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Titanium
Experience your driving passion with our ECS Valved Exhaust System and control your sound with our valved muffler design
Check price at ECS Tuning for ECS Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Titanium (opens the retailer site)
ECS · Part no. 008553ECS12-01
ECS Tuning Exhaust Resonator Delete Section
Change out your ECS Tuning B8/8.5 S4/S5 or B9 A4/S4 Valved Exhaust from resonated to non-resonated!
Check price at ECS Tuning for ECS ECS Tuning Exhaust Resonator Delete Section (opens the retailer site)
Enthusiast Bundles · Part no. 008553ECS03EB2KT
Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust & Kohlefaser Luft-Technik Intake System
Enhance the sound and performance of your S4 with an ECS Tuning cat-back and a Kohlefaser Luft-Technik Intake System
Check price at ECS Tuning for Enthusiast Bundles Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust & Kohlefaser Luft-Technik Intake System (opens the retailer site)
Integrated Engineering · Part no. IEEXCG3
IE Catback Exhaust System - B8 S4
Features dual 2.5” tubing, 90mm quad tips, and iE's DroneTrap technology
Check price at ECS Tuning for Integrated Engineering IE Catback Exhaust System - B8 S4 (opens the retailer site)
Magnaflow · Part no. 15599
Cat-Back Exhaust
2.25" stainless steel with dual 3.5" polished stainless tips
Check price at ECS Tuning for Magnaflow Cat-Back Exhaust (opens the retailer site)
Milltek Sport · Part no. SSXAU268
Cat-Back Exhaust System - Non-Resonated
2.37" stainless steel with quad 80mm polished tips
Retailer fitment note: Up to the 2012 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Non-Resonated (opens the retailer site)
Milltek Sport · Part no. SSXAU240
Cat-Back Exhaust System - Non-Resonated
2.37" stainless steel with dual black Cerakote oval tips
Retailer fitment note: Up to the 2012 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Non-Resonated (opens the retailer site)
Milltek Sport · Part no. SSXAU557
Cat-Back Exhaust System - Non-Resonated Race Version
2.37" stainless steel with quad 80mm black Cerakote tips
Retailer fitment note: Up to the 2012 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Non-Resonated Race Version (opens the retailer site)
Milltek Sport · Part no. SSXAU376
Cat-Back Exhaust System - Non-Resonated Race Version
2.37" stainless steel with quad 100mm polished tips
Retailer fitment note: From the 2013 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Non-Resonated Race Version (opens the retailer site)
Milltek Sport · Part no. SSXAU375
Cat-Back Exhaust System - Non-Resonated Race Version
2.37" stainless steel with quad 100mm black Cerakote tips
Retailer fitment note: From the 2013 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Non-Resonated Race Version (opens the retailer site)
Milltek Sport · Part no. SSXAU556
Cat-Back Exhaust System - Resonated
2.37" stainless steel with quad 80mm GT80 black Cerakote tips
Retailer fitment note: Up to the 2012 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Resonated (opens the retailer site)
Milltek Sport · Part no. SSXAU367
Cat-Back Exhaust System - Resonated
2.37" stainless steel with quad 100mm black Cerakote tips
Retailer fitment note: From the 2013 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Resonated (opens the retailer site)
Milltek Sport · Part no. SSXAU366
Cat-Back Exhaust System - Resonated
2.37" stainless steel with quad 100mm polished tips
Retailer fitment note: From the 2013 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Resonated (opens the retailer site)
Milltek Sport · Part no. SSXAU262
Cat-Back Exhaust System - Resonated
2.37" stainless steel with dual oval black Cerakote tips
Retailer fitment note: Up to the 2012 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Resonated (opens the retailer site)
Milltek Sport · Part no. SSXAU261
Cat-Back Exhaust System - Resonated
2.37" stainless steel with quad 80mm polished tips
Retailer fitment note: Up to the 2012 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Resonated (opens the retailer site)
Milltek Sport · Part no. SSXAU380
Cat-Back Exhaust System - Valvesonic
2.37" stainless steel with dual oval tips
Retailer fitment note: Up to the 2012 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Valvesonic (opens the retailer site)
Milltek Sport · Part no. SSXAU406
Cat-Back Exhaust System - Valvesonic
2.37" stainless steel with quad 100mm black Cerakote tips
Retailer fitment note: From the 2013 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Valvesonic (opens the retailer site)
Milltek Sport · Part no. SSXAU408
Cat-Back Exhaust System - Valvesonic
2.37" stainless steel with quad 100mm Titanium tips
Retailer fitment note: From the 2013 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Valvesonic (opens the retailer site)
Milltek Sport · Part no. SSXAU407
Cat-Back Exhaust System - Valvesonic
2.37" stainless steel with quad 100mm polished tips
Retailer fitment note: *Designed for professional installation only - Setup/configuration must be completed at a Milltek Sport authorized dealer* From the 2013 model year
Check price at ECS Tuning for Milltek Sport Cat-Back Exhaust System - Valvesonic (opens the retailer site)
Scorpion · Part no. SAU044
2.5" Resonated Half Exhaust System
2.5" half-exhaust built to last with 304 stainless steel and quad polished daytona tips
Check price at ECS Tuning for Scorpion 2.5" Resonated Half Exhaust System (opens the retailer site)
Scorpion · Part no. SAU044C
2.5" Resonated Half Exhaust System - Ceramic Tips
2.5" half-exhaust built to last with 304 stainless steel and quad ceramic daytona tips
Check price at ECS Tuning for Scorpion 2.5" Resonated Half Exhaust System - Ceramic Tips (opens the retailer site)

Mufflers (13)

ECS · Part no. 044081LA01
Build-Your-Own Universal Vacuum-Actuated Valved Mufflers Kit
Choose between a 2.5" or 3.0" valved mufflers to complete your custom exhaust.
Check price at ECS Tuning for ECS Build-Your-Own Universal Vacuum-Actuated Valved Mufflers Kit (opens the retailer site)
Valvetronic Designs · Part no. UVM63MMTSTYLEX1
Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 1 Muffler (opens the retailer site)
Valvetronic Designs · Part no. UVM76MMTSTYLEX1
Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler (opens the retailer site)
Valvetronic Designs · Part no. UVM63MMDUALOUTX1
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 1 Muffler (opens the retailer site)
Valvetronic Designs · Part no. UVM63MMDUALOUTX2
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 2 Mufflers (opens the retailer site)
Valvetronic Designs · Part no. UVM76MMDUALOUTX1
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler (opens the retailer site)
Valvetronic Designs · Part no. UVM76MMDUALOUTX2
Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 2 Mufflers (opens the retailer site)
Valvetronic Designs · Part no. UVM.63MM.X1
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 1 Muffler (opens the retailer site)
Valvetronic Designs · Part no. UVM.63MM.X2
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 2 Mufflers (opens the retailer site)
Valvetronic Designs · Part no. UVM.76MM.X1
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 1 Muffler (opens the retailer site)
Valvetronic Designs · Part no. UVM.89MM.X2
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 2 Mufflers (opens the retailer site)
Valvetronic Designs · Part no. UVM.76MM.X2
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 2 Mufflers
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 2 Mufflers (opens the retailer site)
Valvetronic Designs · Part no. UVM.89MM.X1
Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.5" (89mm) - 1 Muffler
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Check price at ECS Tuning for Valvetronic Designs Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.5" (89mm) - 1 Muffler (opens the retailer site)

X Pipes (3)

034Motorsport · Part no. 034-105-7040
034Motorsport Res-X Resonator Delete
Unleashes a throaty growl and exotic tone that exudes the sound of performance
Check price at ECS Tuning for 034Motorsport 034Motorsport Res-X Resonator Delete (opens the retailer site)
Doorbusters · Part no. 000931ECS01DBKT
B8 3.0T Kohlefaser Luft-Technik Intake System With Center X-Pipe Kit
Upgrade your intake and exhaust system with this limited-time Doorbuster special! This kit includes the ECS Kohlefaser Luft-Technik Intake System and Center X-Pipe Kit.
Check price at ECS Tuning for Doorbusters B8 3.0T Kohlefaser Luft-Technik Intake System With Center X-Pipe Kit (opens the retailer site)
ECS · Part no. 003029ECS01KT
Audi B8/B8.5 S4 3.0T Center X-Pipe Kit
Eliminate the center resonator on your OE system for a more aggressive exhaust note
Check price at ECS Tuning for ECS Audi B8/B8.5 S4 3.0T Center X-Pipe Kit (opens the retailer site)

Cutout (2)

ECS · Part no. 020923ECS02
Build-Your-Own Universal Vacuum-Actuated Exhaust Cutout Kit - Dual Cutouts
Increase HP/TQ and activate a full race exhaust with the flip of a switch, with our ECS Vacuum-Actuated Exhaust Cutouts
Check price at ECS Tuning for ECS Build-Your-Own Universal Vacuum-Actuated Exhaust Cutout Kit - Dual Cutouts (opens the retailer site)
ECS · Part no. 020923ECS01
Build-Your-Own Universal Vacuum-Actuated Exhaust Cutout Kit - Single Cutout
Increase HP/TQ and activate a full race exhaust with the flip of a switch, with our ECS Vacuum-Actuated Exhaust Cutout
Check price at ECS Tuning for ECS Build-Your-Own Universal Vacuum-Actuated Exhaust Cutout Kit - Single Cutout (opens the retailer site)

Axle Back (2)

Milltek Sport · Part no. MSAUVS02KT
ValveSonic Upgrade Kit
Upgrade your Milltek system to Valve Sonic
Check price at ECS Tuning for Milltek Sport ValveSonic Upgrade Kit (opens the retailer site)
Milltek Sport · Part no. MSAUVS01KT
ValveSonic Upgrade Kit
Upgrade your Milltek system to Valve Sonic
Check price at ECS Tuning for Milltek Sport ValveSonic Upgrade Kit (opens the retailer site)

Headers (1)

ECS · Part no. 053829LA01-02
B8 3.0T Free-Flow "Shorty" Exhaust Headers
Experience an impressive 48% increase in flow with our ceramic-coated, tubular stainless steel headers!
Check price at ECS Tuning for ECS B8 3.0T Free-Flow "Shorty" Exhaust Headers (opens the retailer site)

Valve Controller (1)

ECS · Part no. 004788LA01
Remote Vacuum Exhaust Valve Control Kit
Control your exhaust valves with the click of a button! Includes a standalone vacuum pump, wiring, vacuum hose, and controllers.
Check price at ECS Tuning for ECS Remote Vacuum Exhaust Valve Control Kit (opens the retailer site)

Complete System (1)

Supersprint · Part no. 769101KT
Race Header Full Exhaust System - Resonated
Stainless steel system with high flow catalytic converter
Check price at ECS Tuning for Supersprint Race Header Full Exhaust System - Resonated (opens the retailer site)

Catalytic Converter (1)

Supersprint · Part no. 767702KT
Supersprint High-Flow Catalytic Converter Kit
Includes left and right side metallic high-flow sport cats and connecting pipes
Check price at ECS Tuning for Supersprint Supersprint High-Flow Catalytic Converter Kit (opens the retailer site)