730-HP Audi RS4: Insanely Fast Rear-Turbo

Sleeper Styling, Still Present.

Get ready, car enthusiasts! Officially Gassed is back to wow us with an incredible build based on the B7-generation Audi RS4 Avant (station wagon). Despite the fact that the power-packed station wagon already has remarkable performance, installing a forced induction system — plus numerous additional modifications — gives us a preview of its remarkable tuning potential.

James possesses the mighty Audi RS4, run by a turbocharged 4.2-liter V8 that produces an awe-inspiring 730 horsepower at eight PSI of boost. Its precise turbo arrangement and nitrous injection improve mid-range torque transmission, yet that is not what is so extraordinary. We have seen earlier Audis modified to beat the 700 hp mark, but what sets this particular construction apart? The placement of the turbocharger.


The back-located turbo system is the focal point of this build. James proudly displays the design with a handcrafted glass cover, providing a peek at the turbo under the trunk floor. The turbo, set up as a three-inch Precision Turbo model, is accompanied by a 1.5-inch external wastegate. The exhaust is routed straight to the turbo, and the system features an equipped muffler with a pressure-controlled opening for extra loudness. Additionally, it comes with a water-methanol injector for more power.

The proprietor has taken a proactive stance on the entire development, aside from the tuning adjustment done by MRC. The machine is outfitted with an unmodified factory motor plus a CG Motorsport twin-plate ceramic clutch. Equipped with reinforced engine and drivetrain mounts as well as a milled short shifter for undisturbed service. For management, it makes use of a baseline Bosch 9.1 ECU while improving upon its suspension through Bilstein parts.

Experiencing the high-octane power of the Audi RS4 was inspiring to all who laid eyes upon it. Its engine’s delivery could be comprehended as both sophisticated and ferocious – holding onto the V8 character while still sporting its state-of-the-art upgrades. By melding turbocharging, nitrous augmentation, and precision craftsmanship, an ideal road cavalcade was achieved.

James’ meticulousness and resolution to keep up with OEM aesthetics makes this construction stand above the rest. With determinations to bolster the car’s power more, James looks forward to taking advantage of this particular creation completely. It demonstrates you can take pleasure in a stock sleeper appearance without going overboard.

Sadly for American fans, we no longer get the RS4 – instead getting the RS5 Sportback – but that doesn’t mean Audi is done with mean wagons. In fact, the German automaker is reportedly prepping an even more hardcore version of its RS6 that will “blow your effing mind.”


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