B7 Audi RS4 GruppeM RAM AIR intake (onboard)

Onboard sound of GruppeM intake. Total gain: 21.5whp over stock (tested by European Car Magazine). http://www.gruppemusa.com/2010/10/audi-rs4-gruppem-ramair-intake-testing/ . Other mods to car previously tested are Stratomosphere/Milltek downpipes/cats,Magnaflow exh,Revo Stg2 software,Tyreguardian puncture protection system

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