AUDI RS4 B9 TUNING & PERFORMANCE PARTS
AUDI S4 B9 TUNING & PERFORMANCE PARTS
Audi S4 & RS4
Performance & Tuning Parts
RacingLine has earned quite a reputation for its upgrades to Audi's B9-platform S & RS cars. Whether you have a track-ready car or a subtly enhanced daily driver, we've got something for you.
Take a look through our extensive range of Performance Upgrades and our race-proven, road-optimised tuning programme, OEM+. All developed and proven on road, track and dyno.
Our B9 S4 Sport Springs will lower your car just perfectly, and give sharper handling responses.
Take a look around.
Performance & Tuning Parts.
Our most popular.
3.0 V6T & 2.9 V6TT
Our OEM+ Performance Software is simply the most effective modification you can make to a modern turbocharged engine.
RacingLine offers separate stages of performance from Stage 1 to Stage 3 - plus Stage 1+ for the later GPF-equipped cars.
And remember, it's only with OEM+ that you get FREE upgrades up to the next stage whenever you're ready to continue on your tuning journey.
The RacingLine Oil Catch Can System for the B9 Audi V6T S4/S5/SQ5 EA839 engine uses a series of internal baffles in both the breather plate and the catch tank itself to keep your inlet tracts clear of oil residue.
Enhance your Audi S4 B9 dynamics with our carefully developed Sport Springs, specifically for this model.
Improve looks, subtly tighten handling characteristics with our 20-25mm lower spring sets.
Yet crucially, maintain enough wheel travel to keep a factory ride quality too.
Welcome to our Carbon EA839 Air Intake - specifically for fitment on S4/RS4 B9 models. Simply the most sophisticated air intake for this platform, combining stunning appearance and material quality, plus our sophisticated Trifoam filter giving airflow capability for power levels up to 700hp.
Carbon Air Intake.
In all of our B9-platform R&D work, it has become very clear that whilst the laser-welded body is very stiff and well reinforced, handling will always benefit from a sharper, stiffer bodyshell.
So, our beautiful B9 Billet Body Brace for all A4, S4, RS4 tightens up the weakest point on the car between the top suspension mounts, replacing the flimsy factory version.
All with no drilling or cutting.
Doesn't your pride and joy deserve better than the cheap plastic parts in the engine bay and around the car?
We think so too, so we've introduced our beautiful billet aluminium replacement caps and housings for B9 A4/S4/RS4. Hand polished, then anodised in deep midnight black to look good, and keep your car functioning perfectly for years to come.