QUATTRO MEETS PRACTICALITY
B5 through B9 — Audi's compact sedan with available Quattro AWD and turbo power.
Audi A4 HERITAGE
THE QUATTRO COMPACT
MOTORMIA A4 builds span B5 1.8T stage-3 tuners, B7 RS4 V8 swap projects, B8/B9 ECU-tuned dailies, and the S4 supercharged V6 generation. Many parts cross-fit with VW MK6/MK7 platforms.
Audi A4 ON MOTORMIA
THE NUMBERS
CATEGORIES
Top product categories for the Audi A4
BRANDS
Top brands for Audi A4 builds
READY TO BUILD YOUR AUDI A4?
Pick your year and trim to shop verified-fit Audi A4 parts.
Shop all Audi A4 parts →Verified Fitment
Audi A4 Category exhaust Parts
238 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.
BRE EXHAUST
EXHAUST KIT 02-05 AUDI A4 QUATTRO
BRE EXHAUST
DIRECT-FIT RESONATOR - 05-09 AUDI A

BRExhaust
DIRECTFIT EXHAUST SYSTEM 0203 AUDI A4 QUATRO 1.8L

BRE EXHAUST
EXHAUST KIT 05-09 AUDI A4 2.0L

BRE EXHAUST
FRONT PIPE KIT - 98-05 PASSAT 1.8L

BRE EXHAUST
EXHAUST KIT - 97-01 AUDI A4 QUATTRO
BRE EXHAUST
DIRECT-FIT PIPE - 97-01 AUDI A4 QUA

BRE EXHAUST
FRONT PIPE KIT - 02-05 A4 QUATTRO,

BRE EXHAUST
DIRECT-FIT PIPE - 05-08 AUDI A4 QUA

BRExhaust
DIRECTFIT EXHAUST SYSTEM 0205 AUDI A4 QUATTRO 1.8L

BRE EXHAUST
FRONT PIPE KIT - 02-05 A4 QUATTRO,

BRE EXHAUST
FRONT PIPE KIT - 05-08 A4 QUATTRO 2

BRE EXHAUST
FRONT PIPE KIT - 05-08 A4 QUATTRO 2
BRE EXHAUST
DIRECT-FIT EXHAUST SYSTEM REPLACEME

BRExhaust
0916 AUDI A4 DIRECTFIT EXHAUST SYSTEM

BRExhaust
DIRECTFIT EXHAUST SYSTEM 9801 AUDI A4 QUATTRO 1.8L

Walker Exhaust
MUFFLER ASSEMBLY - QUIET-

Walker Exhaust
RESONATOR ASSEMBLY - IMPO

Walker Exhaust
CONVERTER- DF- CARB- CALC

Walker Exhaust
CONVERTER- DF- EPA- ULTRA
Walker Exhaust
RESONATOR ASSEMBLY - IMPO

AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
MUFFLER CENTER ANSA OER
AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
MUFFLER CENTER ANSA OER
AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
EXHAUST PIPE FRONT ANSA OER

AP Exhaust Products
AUDI A4 QUATTRO OBDII CATALYTIC CONVERTER DIRECT FIT
AP Exhaust Products
MUFFLER REAR ANSA OER

AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
MUFFLER CENTER ANSA OER

AP Exhaust Products
9601 A4 2.8L PREBENT EXHAUST PIPE

AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
EXHAUST PIPE FRONT ANSA OER

AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
CATALYTIC CONVERTER UNIVERSAL OBDII CALIFORNIA STD OVAL ANGLED
AP Exhaust Products
CATALYTIC CONVERTER UNIVERSAL OBDII CALIFORNIA STD ROUND O2
Walker Exhaust
MUFFLER ASSEMBLY - QUIET-
Walker Exhaust
Catalytic Converter: Variuos Makes and Models; direct fit

Walker Exhaust
FLEX PIPE VW PASSAT

Magnaflow
CONV DF 2002 - 2004 AUDI A4 QUATTRO

Borla
A4 QUATTRO 1719 2.0L i4 AT/MT AWD 4DR 2.00/2.75/3.00IN STYPE BLACK CHROME TIP

Magnaflow
CONV DF 2009 AUDI A4 QUATTRO 3.2L
CORSA Performance
Exhaust Downpipe 3.0 Inch 09-14 Audi A4 A5 B8 2.0T

Magnaflow
Direct-Fit Pipe - 02-03 Audi A4 Quattro 1.8L

Magnaflow
Direct-Fit Pipe - 05-08 Audi A4 Quattro 2.0L
Magnaflow
Direct-Fit Resonator - 05-09 Audi A4 Quattro 2.0L

Hella
SENSOR EXHAUST GAS TEMPERATURE
Borla
A4 QUATTRO 1719 2.0L i4 AT/MT AWD 4DR 2.00/2.75/3.00IN STYPE

Borla
A4 QUATTRO AVANT/ALLROAD 1719 2.0L i4 AT/MT AWD 4DR STYPE STAINLESS BRUSHED TIP

Magnaflow
CONV DF 2001 MAZDA PROTEGE 1.6L
Magnaflow
DF CONVERTER

Magnaflow
Direct-Fit Pipe - 98-05 A4 Passat 1.8L
Magnaflow
Direct-Fit Pipe - 02-05 Audi A4 Quattro 1.8L

Borla
A4 QUATTRO 1719 2.0L i4 AT/MT 4DR 2.00/2.75/3.00IN STYPE STAINLESS BRUSHED TIP

Borla
A4 QUATTRO AVANT/ALLROAD 1719 2.0L i4 AT/MT AWD 4DR STYPE BLACK CHROME TIP
Magnaflow
Direct-Fit Pipe - 04-05 Audi A4 Quattro 1.8L
Magnaflow
Direct-Fit Pipe - 04-16 Highlander RX330 RX350 Sienna
Magnaflow
Direct-Fit Pipe - 97-05 A4 Passat 1.8L

Hella
SENSOR EXHAUST GAS TEMPERATURE
FAQ
Frequently Asked Questions About the Audi A4
What are the best aftermarket parts brands for the Audi A4?
The top brands MOTORMIA owners trust for Audi A4 builds are EBC, PowerStop, H&R, Bilstein, and Magnaflow. The catalog carries 3,135 parts that fit the A4. Use the fitment selector to filter to your specific year and trim, then browse by category or brand.
What's the best trim or sub-model of the Audi A4 to modify?
The most-modified A4 trims are S4 (especially B5 / B7 / B8 / B9 supercharged). These trims typically came with performance-focused suspension, brakes, and engine options that give a higher starting point. That said, the A4's engine family (1.8T, 2.0T EA888, 3.0T supercharged (S4), 4.2 V8 (B7 RS4)) shares aftermarket across most trims, so base-trim builds with the right bolt-ons can match higher trims on power.
What's the typical mod path for a Audi A4?
For most Audi A4 builds, the recommended modification order is: ECU tune → intake → downpipe → suspension → turbo upgrade. This sequence stages upgrades so each mod supports the next — tuning unlocks gains from intake/exhaust, suspension keeps the added power planted. MOTORMIA member builds let you see exact part lists for Audi A4 builds at every power level.
How does the Audi A4 aftermarket compare to the BMW 3 Series?
The Audi A4 is the Quattro AWD compact sedan with the EA888 2.0T platform shared across Audi/VW. On MOTORMIA, 3,135 parts fit the A4 across 3,000+ active member builds, with an average part MSRP of $711. The decision usually comes down to which platform you own — both have full bolt-on catalogs.
Will any Audi A4 part fit my year and trim?
Not always. The Audi A4 has had multiple generations and engine changes (e.g., 1.8T, 2.0T EA888, 3.0T supercharged (S4), 4.2 V8 (B7 RS4)), and parts are generation- and trim-specific. MOTORMIA's catalog uses verified fitment data — every product page shows exactly which years and submodels of the A4 a part fits. Use the fitment selector at the top of any page to pre-filter to your build.
Does MOTORMIA offer returns on Audi A4 parts?
Yes. Most Audi A4 parts on MOTORMIA are eligible for our 30-day return policy provided they're unused, uninstalled, and in original packaging. Special-order parts are flagged with a "Special Order" badge on the product page. Manufacturer warranties are processed through MOTORMIA on your behalf.
MOTORMIA APP
Build your Audi A4 with Mia
Personalized Audi A4 mod recommendations, verified fitment from real A4 owners, and a garage that tracks every part on your build.
- Mod recommendations tuned to your A4 year, trim, and submodel
- Verified fitment data from 3,000+ Audi A4 member builds
- Performance gain estimates based on real-world results
- Save your garage and track every part you've installed