Audi A4 Oil and Coolant: Check the Specification Before Buying
Choose Audi A4 fluids by the exact vehicle requirement, then compare the formula and package. B7, B8 or B9 alone is not a complete fluid specification.
By Lee Shahin ·
Audi A4 mods and performance parts
763 parts for the B9 Audi A4 (2.0T), grouped by what you are changing. Each page lists the options by brand and part number and links to the retailer for price and fitment.
Fitment: 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.
Exhaust
Audi A4 exhaust systems →
43 parts 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.
Audi A4 downpipes →
5 parts from 5 brands. The downpipe joins the turbocharger outlet to the rest of the exhaust. Aftermarket versions are sold with a high-flow catalytic converter or without one.
Audi A4 exhaust tips →
55 parts from 4 brands. Clamp-on and weld-on exhaust tips. Most are universal parts sized by inlet and outlet diameter, not made for one car.
Engine
Audi A4 intakes →
33 parts from 13 brands. Replacement intake systems, airboxes and filters.
Audi A4 charge pipes →
3 parts from 2 brands. Replacement pipes for the pressurised intake tract between the turbocharger, intercooler and throttle body.
Audi A4 tunes & engine software →
40 parts from 13 brands. Engine and transmission software, flash tuners, piggyback modules and throttle controllers.
Audi A4 intercoolers & charge cooling →
8 parts from 7 brands. Intercoolers, heat exchangers and related charge-cooling parts.
Audi A4 turbochargers & turbo parts →
21 parts from 10 brands. Turbochargers, turbo kits, inlets and related hoses.
Audi A4 fuel & ignition →
26 parts from 10 brands. Fuel pumps, injectors, flex-fuel kits, ignition coils and spark plugs.
Audi A4 cooling upgrades →
2 parts from 2 brands. Radiators, oil coolers, expansion tanks and hoses sold as upgrades.
Audi A4 engine & mounts →
32 parts from 9 brands. Engine and transmission mounts, catch cans, pulleys and internal engine parts.
Audi A4 drivetrain →
8 parts from 4 brands. Axles, driveshafts, differentials and limited-slip units.
Suspension
Audi A4 coilovers →
38 parts from 10 brands. Height-adjustable spring and damper assemblies.
Audi A4 lowering springs →
19 parts from 13 brands. Shorter springs that lower ride height on the factory or aftermarket dampers.
Audi A4 suspension & chassis →
92 parts from 24 brands. Sway bars, control arms, bushings, strut braces, dampers and alignment parts.
Brakes
Wheels
Exterior
Audi A4 front lips & splitters →
13 parts from 3 brands. Front lips and splitters that attach to the lower edge of the front bumper.
Audi A4 spoilers & wings →
6 parts from 3 brands. Trunk spoilers, roof spoilers and wings.
Audi A4 rear diffusers →
4 parts from 3 brands. Rear diffusers and rear bumper trim.
Audi A4 exterior & aero →
32 parts from 4 brands. Grilles, mirror caps, side skirts, emblems and other exterior parts.