Power comes from a 2.7-liter TDI engine which produces 230 bhp and 358 lb-ft, thanks to a revised ECU.

AVUS Performance has unveiled a new tuning program for the Audi A4 Avant.

This particular model, dubbed the Black Arrow, features gloss black 21-inch wheels and a coilover suspension. The company also offers 19- and 20-inch wheels, LED taillights, and several matt wraps (black, white, etc).

Power comes from a 2.7-liter TDI engine, which is outfitted with a stage 1 performance ECU. Thanks to the electronic wizardry, the engine produces 230 bhp and 358 lb-ft of torque instead of 190 bhp and 295 lb-ft of torque.

If you don't have an A4 2.7 TDI, AVUS also offers performance upgrades for the 3.0 TDI and all other turbocharged engines.

Gallery: AVUS Performance Black Arrow based on Audi A4 Avant