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.

Magnaflow
MagnaFlow OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter 51461

Magnaflow
MagnaFlow 2005-2009 Audi A4 Quattro OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter

Magnaflow
MagnaFlow Direct Fit Catalytic Converter Audi 97-05 A4/A4 Quattro / Volkswagen 00-05 Passat 1.8L

Magnaflow
MagnaFlow California Grade CARB Compliant Converter Direct-Fit 05-09 Audi A4 / A4 Quattro

Magnaflow
MagnaFlow HM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter 24175

aFe
aFe 17-19 Audi A4 (L4-2.0L) MACH Force-Xp Stainless Steel Axle-Back Exhaust System - Black Tip

aFe
aFe 20-21 Audi A4 L4-2.0L (t) MACH Force-Xp 3in to 2-1/2in Stainless Steel Cat-Back Exhaust System

aFe
afe MACH Force-Xp 13-16 Audi Allroad L4 SS Axle-Back Exhaust w/ Blue Flame Tips

aFe
aFe MACHForce XP Exhaust Cat-Back SS-304 09-12 Audi A4 (B8) L4 2.0L (t)

aFe
afe POWER MACH Force-Xp 09-16 Audi A4/A5 B8 L4-2.0L(t) 304 SS 3in. Front Resonator Delete Pipe

aFe
aFe 09-16 Audi A4/A5 (B8) L4-2.0L (t) Twisted Steel 3in. Downpipe - 304 Stainless w/ Cat

aFe
aFe 17-19 Audi A4 (B9) MACH Force-Xp 3in to 2.5in 304 SS Cat-Back Exhaust System-Dual Carbon Tips

aFe
aFe 17-19 Audi A4 (L4-2.0L) MACH Force-Xp Stainless Steel Axle-Back Exhaust System - Carbon Tip

aFe
aFe 17-19 Audi A4 (B9) MACH Force-Xp 3in to 2.5in 304 SS Cat-Back Exhaust System-Dual Polished Tips

aFe
aFe 20-21 Audi A4 L4-2.0L (t) MACH Force-Xp 3in to 2-1/2in 304 SS Axle-Back Exhaust System

aFe
aFe MACHForce XP 3in-2.5in SS Exhaust Axle-Back 17-19 Audi A4 (B9) L4-2.0L (t) - Polished

aFe
aFe 17-19 Audi A4 (B9) MACH Force-Xp 3in to 2.5in 304 SS Cat-Back Exhaust System-Dual SS Tips

034Motorsport
Hardware, 1.8T Exh Mani

034Motorsport
Clamp, Exhaust, OE Style, 65mm
BRE EXHAUST
FLANGE GASKET - 09-14 AUDI A4 QUATT
BRE EXHAUST
FLANGE GASKET - 09-14 AUDI A4 QUATT

BRE EXHAUST
FLANGE GASKET - 96-05 AUDI VW

NICKSON INDUSTRIES
FIBER GASKET W/RING
Dana
EXHAUST PIPE GASKET
Dana
EXHAUST MANIFOLD GASKET SET
Dana
EXHAUST MANIFOLD GASKET SET

Dana
EXHAUST MANIFOLD GASKET SET

Dana
EXHAUST PIPE GASKET
Dana
EXHAUST PIPE GASKET
Dana
EXHAUST PIPE GASKET

AP Exhaust Products
MOUNT RUBBER

AP Exhaust Products
MOUNT RUBBER

AP Exhaust Products
SLEEVE
AP Exhaust Products
0913 FORESTER/9802 PASSPORT EXHAUST FLANGE GASKET

Magnaflow
Flange Gasket - 76-09 Audi Pontiac VW Volvo

Mahle
AUDI VOLKSWAGEN 2771CC 2.8L AHA 1997-1999

Mahle
AUDI VW 3.0L 3.2L DOHC 24V 2005-2012
Clevite
AUDI / VOLKSWAGEN MULTIPLE APPLICATIONS 19962013 EXHAUST PIPE GASKET

Mahle
~(0.2 lbs. 16X6X0)~ VW-PASS 1.8L 20VALVE DOHC TURBO 1998-2003

Mahle
AUDI/VW 1.4L AND 2.0L 2015-2018 Exhaust Manifold Gasket

Magnaflow
Bolt - 97-10 Audi VW

Mahle
AUDI VOLKSWAGEN 2771CC 2.8L ATQ 2000-2005
Victor Reinz
Exhaust Manifold Gasket - 71-37422-00

Victor Reinz
Exhaust Manifold Gasket Set - 71-31958-00

Mahle
AUDI VOLKSWAGEN MULTIPLE APPLICATIONS 1996-2013

Mahle
~(0.1 lbs. 9X7X0)~ 2000-2006 VW/AUDI 1.8L

Clevite
AUDI / VOLKSWAGEN 1781CC 1.8L 2671CC 2.7L 19992006 TURBO OIL DRAIN

Victor Reinz
Exhaust Pipe Flange Gasket - 71-33841-00

034Motorsport
MANIFOLD,1.8T LONGLONGITUDINA

034Motorsport
DOWNPIPE,B8 A4 HFCHIGH FLOW C

034Motorsport
DOWNPIPE,B7 A4 HFCHIGH FLOW C

034Motorsport
DOWNPIPE,B5-B6 A4 HFCHIGH FLO

034Motorsport
High Flow Cat, B9 Audi A4 2.0T

Industrial Injection
Inustrial Injection GT1749V Turbocharger Serv VW AUDI - 717858-5010S

Magnaflow
MagnaFlow USE 106-0744106-0320

Magnaflow
MagnaFlow Exhaust Kit - 97-01 Audi A4 Quattro 1.8L106-0388

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

BRExhaust
DIRECTFIT EXHAUST SYSTEM 0405 AUDI A4 QUATRO 1.8L

BRExhaust
DIRECTFIT EXHAUST SYSTEM 0509 AUDI A4 2.0L

BRE EXHAUST
DIRECT-FIT PIPE - 02-05 AUDI A4 QUA
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