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
DF CONVERTER

Magnaflow
CONV DF 2002 - 2004 AUDI A4 QUATTRO

Magnaflow
BRE Exhaust 04-05 Audi A4 Quatro 1.8L Exhaust Kit

Magnaflow
BRE Exhaust 02-05 A4 Quattro A4 1.8L Front Pipe Kit

Fel-Pro
Fel-Pro Audi Q5 61845 Exhaust Pipe Flange Gasket

Magnaflow
BRE Exhaust 05-08 A4 Quattro 2.0L Front Pipe Kit

Fel-Pro
Fel-Pro Audi Q5 61924 Catalytic Converter Gasket

Magnaflow
BRE Exhaust 05-08 A4 Quattro 2.0L Front Pipe Kit

Magnaflow
BRE Exhaust 02-05 A4 Quattro A4 1.8L Front Pipe Kit

Magnaflow
BRE Exhaust 97-01 A4 Quattro 1.8L Front Pipe Kit

Magnaflow
BRE Exhaust 98-05 Passat 1.8L Front Pipe Kit

Magnaflow
BRE Exhaust 05-08 A4 Quattro 2.0L Front Pipe Kit

Magnaflow
BRE Exhaust 02-05 A4 Quattro A4 1.8L Front Pipe Kit

Magnaflow
MagnaFlow BRE Exhaust Kit 09-16 Audi A4 Quattro 2L

Magnaflow
MagnaFlow BRE Exhaust Kit 02-05 Audi A4 Quattro 1.8L

Magnaflow
MagnaFlow BRE Exhaust Kit 05-09 Audi A4 2.0L

Fel-Pro
Fel-Pro Volkswagen Passat 61782 Exhaust Pipe Flange Gasket

Fel-Pro
Fel-Pro Volkswagen Jetta 61458 Exhaust Pipe Flange Gasket

Fel-Pro
Fel-Pro Volkswagen Passat MS 96882 Exhaust Manifold Gasket Set

Fel-Pro
Fel-Pro Volkswagen Tiguan MS 96784 Exhaust Manifold Gasket Set

Fel-Pro
Fel-Pro Volkswagen Passat 61198 Exhaust Pipe Flange Gasket

Fel-Pro
Fel-Pro Volkswagen Passat 61197 Exhaust Pipe Flange Gasket

Fel-Pro
Fel-Pro Audi TT Quattro 61171 Exhaust Pipe Flange Gasket
Remus
Remus 2008 Audi A4 B8 1.8L/2.0L TDI Axle Back Exhaust w/Carbon Tail Pipe Set
Remus
Remus 2008 Audi A4 B8 1.8L/2.0L TDI Axle Back Exhaust w/Polished Tail Pipe Set

Magnaflow
MagnaFlow 2018-2020 Audi Q5 OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter

Borla
Borla 17-19 A4 Quattro Avant/Allroad 2.0L i4 AT/MT Awd 4DR S-Type Catback

Magnaflow
MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 448304

Magnaflow
MagnaFlow 2006-2008 Audi A4 Quattro California Grade CARB Compliant Direct-Fit Catalytic Converter

Magnaflow
MagnaFlow 2006-2008 Audi A4 Quattro California Grade CARB Compliant Direct-Fit Catalytic Converter

Magnaflow
MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 4481659

Magnaflow
MagnaFlow 2006-2009 Audi A4 Quattro California Grade CARB Compliant Direct-Fit Catalytic Converter

Magnaflow
MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 4561062

Magnaflow
MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 4481355

Magnaflow
MagnaFlow 2006-2009 Audi A4 Quattro California Grade CARB Compliant Direct-Fit Catalytic Converter

Magnaflow
MagnaFlow 2005-2006 Audi A4 Quattro California Grade CARB Compliant Direct-Fit Catalytic Converter

AWE Tuning
AWE Tuning Audi B8 A4 Touring Edition Exhaust - Single Side Diamond Black Tips

AWE Tuning
AWE Tuning Audi B7 A4 3.2L Track Edition Quad Tip Exhaust - Diamond Black Tips

Torque Solution
Torque Solution 2014 Audi MK3 TT w/ IHI Turbochargers Turbo Muffler Delete

AWE Tuning
AWE Tuning Audi B7 A4 3.2L Touring Edition Dual Tip Exhaust - Diamond Black Tips

AWE Tuning
AWE Tuning Audi B7 A4 3.2L Track Edition Dual Tip Exhaust - Diamond Black Tips

Victor Reinz
MAHLE Original Audi TT Quattro 13-12 Exhaust Pipe Gasket

AWE Tuning
AWE Tuning Audi B8.5 All Road Touring Edition Exhaust - Dual Outlet Diamond Black Tips

AWE Tuning
AWE Tuning Audi B7 A4 3.2L Touring Edition Quad Tip Exhaust - Diamond Black Tips

AWE Tuning
AWE Tuning Audi B8 A4 Touring Edition Exhaust - Quad Tip Polished Silver Tips - Does Not Fit Cabrio

AWE Tuning
AWE Tuning Audi B8 2.0T Resonated Performance Downpipe for A4 / A5

AWE Tuning
AWE Tuning Drivetrain Stabilizer (DTS) Mount Package - Polyurethane

AWE Tuning
AWE Tuning B9 A4 A5 Track to Touring Conversion Kit

Remus
Remus Audi A4 B8 Sedan and Avant Axle Back

AWE Tuning
AWE Tuning Audi B8 A4 Touring Edition Exhaust - Single Side Polished Silver Tips

AWE Tuning
AWE Tuning Audi B9 A4 Touring Edition Exhaust Dual Outlet - Diamond Black Tips (Includes DP)

AWE Tuning
AWE Tuning Audi B9 A4 Track Edition Exhaust Dual Outlet - Diamond Black Tips (Includes DP)

AWE Tuning
AWE Tuning Audi B9 A4 Touring Edition Exhaust Dual Outlet - Chrome Silver Tips (Includes DP)

AWE Tuning
AWE Tuning Audi B9 A4 Track Edition Exhaust Dual Outlet - Chrome Silver Tips (Includes DP)

AWE Tuning
AWE Tuning Audi B8 A4 Touring Edition Exhaust - Quad Tip Diamond Black Tips - Does not fit Cabriolet

Victor Reinz
MAHLE Original Audi A4 99-97 Exhaust Manifold Set

AWE Tuning
AWE Tuning Audi B9 A4 SwitchPath Exhaust Dual Outlet - Chrome Silver Tips (Includes DP and Remote)

Victor Reinz
MAHLE Original Audi A3 13-06 Exhaust Manifold Gasket

AWE Tuning
AWE Tuning Audi B7 S4 Track Edition Exhaust - Polished Silver Tips

AWE Tuning
AWE Tuning Audi B9 A4 SwitchPath Exhaust Dual Outlet - Diamond Black Tips (Includes DP and Remote)
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