There may be no RS badged variant for the current B8 Audi A4, but German tuner Avus Performance has come up with a tweaked S4 that provides RS4 levels of performance to challenge the BMW M3.

In standard form, the S4 is no slouch with a 3.0-litre supercharged V6 engine that makes 333 bhp and 440 Nm of torque. Clearly not enough for Avus, they threw in a series of upgrades that included a custom exhaust system. The end result is 420 bhp and 540 Nm of torque, which compares well with the naturally aspirated M3’s 414 bhp/400 Nm. Avus doesn’t provide performance numbers, but their car should be much faster than the S4’s 0-100 km/h time of 5.1 seconds. Along with the added grunt, Avus added in a new spring kit along with 20-inch alloy wheels wrapped with 255/30 Hankook Ventus S1Evo tyres. Strange rubber choice from a European tuner.

The S4’s looks have been made more aggressive by a new front grille, spoiler, and rear diffuser painted in metallic black. Customers can choose to replace the abovementioned parts with carbon fibre items. Unsurprisingly, the car’s cabin can be specified with carbon trim as well. Gallery after the jump.

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