About This Audi S4 2004 Build
We love featuring real builds from real owners. This Audi S4 2004 sits on a set of 18″, 19″, 20″ / 18″, 19″, 20″-inch TSW NEPTUNE wheels, and the result speaks for itself.
The owner chose TSW for a reason. This brand delivers serious quality and a design language that turns heads at every car meet. We see hundreds of Audi S4 builds come through WheelFront every month, but this one stands out. The combination of the exterior with the TSW NEPTUNE creates a look that balances aggression with elegance.
Fitment Breakdown: TSW NEPTUNE on the Audi S4 2004
I walked around this B6 S4 at the meet, and the TSW Neptune setup really caught my eye. The B6 platform is notoriously picky about offset, but these wheels sit just right. They fill the wheel wells without looking like a monster truck.
We see a lot of guys struggle with the massive front calipers on these S4s. The Neptune spokes have enough of a curve to clear those big brakes with room to spare. You will not need a massive spacer to get these to spin freely.
The hub bore on the B6 is 57.1mm, and these wheels use the right rings to ensure a perfect fit. I hate when wheels vibrate at highway speeds because of a sloppy fit. These feel tight and planted on the road.
I noticed the barrel depth provides a nice, aggressive profile that matches the lines of the car. The width is balanced well to keep the handling sharp. You get plenty of grip without sacrificing that crisp steering feel.
When you drop this car on coilovers, you have to watch the inner fender liners. The Neptune offset keeps the tire edge away from the metal, but a heavy bump might still cause a slight rub. We always suggest a quick roll if you plan to slam it.
The spoke design pulls the eye outward, making the car look wider than it actually is. It creates a bold stance that separates this build from the stock crowd. Everything sits flush, exactly how a German sports sedan should.
I checked the rear clearance, and it looks like a clean fit with the stock fenders. You don’t need to pull the metal to make these work. It is a bolt-on aesthetic that screams performance.
What We Recommend for Audi S4 2004 Owners
If you want this look, stick to an 18-inch diameter for the best performance balance. Going up to 19s can look good, but you lose that cushy ride quality on rough asphalt. 18s let you run enough tire sidewall to actually use the S4's power.
For the offset, stay near ET35 to ET40 to avoid rubbing the control arms. We have tried more aggressive offsets, but they tend to kill your steering geometry. Keep it safe and keep it functional.
I always suggest running a square setup on the B6 S4. Staggered wheels on an AWD platform like this will ruin your Quattro system over time. Keep the same width at all four corners to keep the drivetrain happy.
Do not skimp on the tires when you mount these Neptunes. A high-performance summer compound transforms how the car feels in the corners. Stretch is a waste of time for a car with this much torque.
Avoid cheap spacers if you need a little more poke. They often fail or cause vibrations that make you regret the upgrade. Get the right offset from the start and avoid the headache.
Style and Build Analysis
The TSW Neptune finish provides a sharp contrast against the factory Audi paint. It highlights the muscular shoulders of the B6 body. The wheels do not just sit there; they demand you look at them.
I love how the spokes reach all the way to the edge of the barrel. It gives the wheel a larger visual presence. The proportions are spot on for a 2004 era chassis.
The clean lines of the wheel design mimic the S4's understated, elegant aggression. It is not too loud or flashy, just purposeful. This is the definition of a mature, well-thought-out build.
Compared to other builds I have seen, this one keeps the spirit of the original design alive. It looks like something the factory should have offered as a high-end option. The car looks faster just sitting still.
Everything about this car says it belongs on a mountain road, not just at a car show. The stance feels ready to attack a corner the second you drop the hammer. It is a masterclass in selecting the right rolling stock.
Why We Love This Build
Seeing this S4 under the streetlights reminded me why I fell in love with Audi. The TSW Neptunes catch the light perfectly as the car rolls into the lot. The silver finish glows against the dark body, making the stance look hunkered down and ready for action. It is the perfect marriage of a legendary engine and a modern wheel.
The way the tire sidewall kisses the fender edge makes me smile every time I look at it. It’s not overdone or gaudy, just clean and intentional. This build proves that you do not need to butcher a car to make it look incredible.
If you want an S4 that turns heads without trying too hard, this is your blueprint. Build it, drive it, and enjoy every single mile. Your car deserves this upgrade.
Full Specs Breakdown
Here is exactly what this owner is running. We break down every detail so you can replicate this build or use it as a starting point for your own setup.
- Car Make & Model: Audi S4 2004
- Vehicle Color:
- Wheel Brand & Model: TSW NEPTUNE
- Wheel Size: 18″, 19″, 20″ / 18″, 19″, 20″
- Offset: Contact dealer
Before You Buy: Fitment Checklist
We talk to Audi S4 owners every day. These are the questions we hear most before they pull the trigger on new wheels.
Will 18″, 19″, 20″ / 18″, 19″, 20″-inch wheels fit my Audi S4? Yes, but fitment depends on width, offset, and tire size working together. A wrong offset means rubbing. A wrong tire size means poor handling. Always verify all three.
Do I need to modify my fenders? That depends on your offset and suspension. A conservative offset with stock ride height usually fits without modification. Go aggressive and you may need to roll or pull your fenders.
Can I daily-drive this setup? Absolutely. Thousands of Audi S4 owners run 18″, 19″, 20″ / 18″, 19″, 20″-inch wheels every day. The key is choosing the right tire with enough sidewall to absorb road imperfections.
