modified audi s4 avant

Sportec, a tuning firm from Switzerland, has modified the Audi S4 Avant to produce more than 400 PS. Thanks to the newly programmed ECU and the installation of a new sports filter, the Sportec RS425 Audi S4 Avant 3.0-liter V6 compressor engine produces 425 PS instead of the standard 333 PS.

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