Audi A4 exhaust systems
43 exhaust systems for the B9 Audi A4 (2.0T) from 12 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 B9 A4 (2.0T, quattro) category. Confirm engine, drivetrain and model year on the retailer page before ordering.
Brands on this page: Valvetronic Designs (12), ECS (8), AFE (7), Milltek Sport (5), CTS (3), AWE (2), 034Motorsport (1), Doorbusters (1), Enthusiast Bundles (1), Integrated Engineering (1), JH Motorsports (1), Scorpion (1).
Cat Back (18)
AFE · Part no. 49-36420-B
MACH Force-Xp 304 Stainless Steel Cat-Back Exhaust System
Resonated 3" to 2-1/2" with 4" black tips
AFE · Part no. 49-36420-P
MACH Force-Xp 304 Stainless Steel Cat-Back Exhaust System
Resonated 3" to 2-1/2" with 4" polished tips
AFE · Part no. 49-36446
MACH Force-Xp Cat-Back Exhaust System
This system produces a mild sound unleashing all available horsepower and torque!
Retailer fitment note: PRE-ORDER ONLY! AVAILABLE OCTOBER.
AFE · Part no. 49-36420-C
MACH Force-Xp Cat-Back Exhaust System - Carbon Fiber Tips
3.0" - 2.5" Mandrel-Bent T304 Stainless system produced gains of up to +13 HP and +22 lbs Ft. TQ., as measured on AFE's in-house dyno
AWE · Part no. AWEB9A4TR
AWE Touring Edition Exhaust System - Audi B9 A4 2.0T
Delivers a civil, smooth soundtrack throughout the range while providing an enhanced in-cabin driving experience in any Drive Select mode. Features AWE's proprietary 180 Technology® resonators.
Retailer fitment note: For vehicles up through the 2018 model year only (Pre-Facelift)
AWE · Part no. AWEB9A4TK
AWE Track Edition Exhaust System - Audi B9 A4 2.0T
Equipped with the same precision-engineering as its Touring Edition counterpart, minus the 180 Technology® resonators in the rear.
Retailer fitment note: For vehicles up through the 2018 model year only (Pre-Facelift)
CTS · Part no. CTS-EXH-CB-0019
Cat-Back Exhaust System
3.0" tig welded T304 stainless steel with dual 4.0" polished stainless tips
Retailer fitment note: For vehicles up through the 2018 model year only (Pre-Facelift)
Doorbusters · Part no. 049103LA01DBKT
Audi B9 A4 2.0T Non Valved Exhaust System - Cat Back - With Luft-Technik Intake System
Enhance the sound and performance of your vehicle with our Non Valved Exhaust System and a Luft-Technik Intake System
Retailer fitment note: For vehicles up through the 2018 model year only (Pre-Facelift) Does not fit models equipped with a MAF sensor (DBPA or DPAA engine codes)
ECS · Part no. 049103LA01
Audi B9 A4 2.0T Non Valved Exhaust System - Cat Back
Experience your driving passion with our ECS Exhaust System!
Retailer fitment note: For vehicles up through the 2018 model year only (Pre-Facelift)
ECS · Part no. 021275ECS01
Audi B9 A4 2.0T Valved Exhaust System - Cat Back
Max gains of +16 WHP and +17 WTQ on our B9 A4 equipped with a Luft-Technik intake, ECS Intercooler/charge pipes, and a stage 1 tune!
Retailer fitment note: For vehicles up through the 2018 model year only (Pre-Facelift)
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!
Enthusiast Bundles · Part no. 049103LA01EBKT
Audi B9 A4 2.0T Non Valved Exhaust System - Cat Back & Luft-Technik Intake System
Enhance the sound and performance of your vehicle with our Non Valved Exhaust System and Luft-Technik Intake System
Retailer fitment note: For vehicles up through the 2018 model year only (Pre-Facelift) Does not fit models equipped with a MAF sensor (DBPA or DPAA engine codes)
Integrated Engineering · Part no. IEEXCK8
IE Catback Exhaust System - B9 A4
Features high-flow 2.5" piping, 90mm twin exhaust tips, and iE's DroneTrap technology
Milltek Sport · Part no. B9A4SEMIRESONATE
Cat-Back Exhaust - Semi Resonated
2.76" stainless steel with your choice of tip style
Milltek Sport · Part no. B9A4NONRESONATED
Cat-Back Exhaust System - Non-Resonated
2.76" stainless steel with your choice of tip style
Milltek Sport · Part no. B9A4RESONATED
Cat-Back Exhaust System - Resonated
2.76" stainless steel with your choice of tip style
Milltek Sport · Part no. SSXAU612
Cat-Back Exhaust System - Road+ (Semi-Resonated)
2.76" stainless steel with dual GT100 polished tips
Milltek Sport · Part no. SSXAU1112
Milltek Cat-Back Exhaust System - Non-Resonated
Fits with factory exhaust outlets in bumper - no tips are included.
Retailer fitment note: For vehicles from the 2021 model year only.
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.
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
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
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
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
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
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
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
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
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
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
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
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
Mid Pipes (3)
034Motorsport · Part no. 034-105-7044
034Motorsport Res-X Resonator Delete
Unleashes a throaty growl and exotic tone that exudes the sound of performance - Deletes front-most resonator
CTS · Part no. CTS-EXH-TP-0011
Resonator Delete Kit
Installing this part allows for a subtle exhaust sound increase on your factory exhaust
ECS · Part no. 023492ECS01KT
Audi B9 A4/A5 2.0T Center Resonator Delete
Add an aggressive exhaust sound with this Resonator Delete Pipe Kit! Deletes rear-most resonator.
Axle Back (3)
AFE · Part no. 49-36419-C
MACH Force-Xp Stainless Steel Axle-Back Exhaust System
Resonated 3" to 2-1/2" 304 Stainless Steel with carbon fiber tips
AFE · Part no. 49-36419-B
MACH Force-Xp Stainless Steel Axle-Back Exhaust System
Resonated 3" to 2-1/2" 304 Stainless Steel with black tips
AFE · Part no. 49-36419-P
MACH Force-Xp Stainless Steel Axle-Back Exhaust System
Resonated 3" to 2-1/2" 304 Stainless Steel with polished tips
Catalytic Converter (3)
CTS · Part no. CTSEXHTP0006-CAT
3" High Flow Catalytic Converter
Designed to seamlessly fit in place of factory catalytic converter
Retailer fitment note: For vehicles up through 2020
JH Motorsports · Part no. B9A45HFC
JHM 3" Cat-Pipe (High Flow Catalyst)
3.0" T304 Stainless system produces gains of up to 25hp.
Retailer fitment note: For vehicles up through 2020
Scorpion · Part no. SAUX076
3.15" High Flow Sports Cat
3.15" T304 stainless construction, offers increased hp/tq throughout the powerband
Retailer fitment note: For vehicles up through 2020
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
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
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.
More Audi A4 parts
- Audi A4 downpipes
- Audi A4 exhaust tips
- Audi A4 intakes
- Audi A4 charge pipes
- Audi A4 tunes & engine software
- Audi A4 intercoolers & charge cooling
- Audi A4 turbochargers & turbo parts
- Audi A4 fuel & ignition
- Audi A4 cooling upgrades
- Audi A4 engine & mounts
- Audi A4 drivetrain
- Audi A4 coilovers
- Audi A4 lowering springs
- Audi A4 suspension & chassis
- Audi A4 brake upgrades
- Audi A4 wheels
- Audi A4 wheel spacers & hardware
- Audi A4 front lips & splitters
- Audi A4 spoilers & wings
- Audi A4 rear diffusers
- Audi A4 exterior & aero
- Audi A4 interior
- Audi A4 lighting