Steffen’s B7 Avant with RS4 Conversion from Norway

This latest featured ride comes to us from Norway and is modded to the max! The owner Steffen bought the car with some mods already done to it, but as many enthusiasts know there is always more to be done.

The car started out as a lowly A4, the base model of the B7 generation. As you’ll see in this post, nearly every single body panel was replaced as part of his extensive modification process to make it look like a RS4 avant.

No build is complete (nor feature worthy) with only body modifications however, and Stefan’s avant is no exception. The interior, motor, suspension, and wheels all underwent significant changes to become a well rounded and gorgeous machine.

Is this one of the best modded B7 Audi A4 avants? That’s for you to decide, but it’s definitely one of my favorites.

Steffen started with the interior, scouting some beautiful RS4 bucket seats off ebay.de from a totaled RS4. Steffen tells me they’re probably his favorite modification to the car, which is saying something. To complete the interior, he found a custom TTRS steering wheel with carbon fiber accents which is incredibly beautiful.

These two small (but expensive) mods really do a lot to update the interior. Combined with carbon fiber accents throughout, the dated B7 interior takes on a whole new aesthetic, looking more like a Porsche or race car than a grocery getter. The seats are especially race inspired, with high wingbacks that grip your body and keep it in place during high speed maneuvers.

Next came the powertrain and handling – the previous owner had already done a handful of performance modifications such as Revo Stage 2+, so Steffen added some RS4 brakes to assist with braking, which works nicely with the OEM themed upgrades he had already.

The RS4 brakes are 8 piston Brembos, which is a great setup. Combined with two-piece, cross-drilled rotors, this setup saves a significant amount of unsprung weight, while also greatly improving the stopping power over time. Using 8 pistons instead of the A4’s 2 piston setup allows for the heat to be more evenly distributed throughout the rotor, and allows for quicker cooling too. In a road course, this makes a huge difference in the life of your pads and rotors, and ensures you don’t hit brake fade from anything overheating too quickly.

Then something awesome happened – he found a great deal on the major components needed for an RS4 body swap including front fenders, side skirts, rear doors, and the rear bumper – and thus began the conversion project. He was able to source nearly everything he needed from eBay except the rear inner liner and rear quarter panel.

You can see from above that this conversion is far from a normal “body kit” that the average enthusiast might install. Even the doors had to be swapped out to match the new body lines, and nearly every panel had to go through significant body work to complete the conversion…and once the body work was done, the car of course had to be repainted. This kind of conversion is not for the faint of heart, but the outcome is absolutely gorgeous as the B7 RS4 avant has some of the best lines of perhaps any car ever built.

Recently he added some new 19×10 Forgestar F14 wheels to fill those beautiful OEM widebody fender arches, and the result is stunning. Wheels make or break a build, and with widebody fenders Stefan needed something to actually fill out those gigantic wheel wells and take advantage of the extra functionality they provide. 10″ wheels also allow for more concavity in the spokes, a nice design element that plays nicely with the bubbled fenders to show curves in all of the right places on this fantastic B7 Audi A4 avant build.

A full mod list of the car includes:

Engine

• Revo stg 2+ program
• Garret FMIC Intercooler
• Autotech HPFP
• Forge DV
• Milltek exhaust from turbo with racecat
• Okada plasmacoiler
• KN filter
• 034 silicon hoses for intercooler and turbo inlet
• R8 bottle cap for oil and cooling water, carbon engine cover
• STE Performance Parameters Display
• Retrofitted cruise control

Chassis/drivetrain/brakes

• 19×10 Forgestar F14 ET25 with Michelin Pilot Super Sport 255/35/19 all around
• H&R Monotube coilovers (godkjent i vognkort)
• 034 Diff mount
• 034 Snub mount
• Hotchkis Sway Bar
• 034 Sway Bar end links (Adjustable rear)
• JHM Solid Short throw shifter
• VAST stg 3 clutch and OEM flywheel (Backup! – Spec stg 3+ clutch with 034 singlemass flywheel)
• RS4 brakes

Exterior:

• RS4 Widebody
• RS4 blacked out grill
• Carbon aggressive front lip
• Carbon license plate holder
• Carbon B & C pillar
• Carbon mirror caps
• Vinyl wrapped carbon window lists
• Vinyl wrapped inside of headlights for a darker look
• Blacked out windows
• Xenon fog lights
• Lamin-x on rear lights and fog light
• LED Park
• LED license plate lights

Interior:

• RS4 complete leather interior bucket seats
• RS4 pedals
• RS4 carbon interior
• RS4 door opener
• TTRS Custom carbon/alcantara steering wheel
• Custom Carbon/alcantara gear knob
• Custom alcantara surrounding the gearknob and handbrake leaver
• S-line floor mats
• All interior bulbs swapped to LED’s
• Original sunblinds inside rear door sides
• New center console without holes for factory hone

Future plans:

• Mount S4 auto-fold wing mirrors – Ready
• Paint the cooland and washer fluid tanks wrinkle black – Ready
• Paint the license plates a little darker – Ready
• 034 Motorsport Engine mounts – Ready
• Loba LO380L turbo – Ready
• S3 injectors
• Custom welded subwoofer box
• RS4 diffs and drivetrain
• Removeble throwbar
• Stage3/4
• Carbon hood
• More carbon/alcantara parts

The outcome is a labor of love. While it might be easier to buy a RS4, converting an A4 has many advantages including a much lower operating cost thanks to the smaller engine, less taxes as you’re taxed on the value of an A4, and of course being able to make all of the decisions on the build to make it exactly how you wanted it.

Thanks for sharing the pics, and good luck with the rest of the build, Steffen!