The Crew Motorfest has some of the best engine sounds in almost any game ever, probably even above the NFS Blackbox games dare I say. I'd LOVE it if someone made a complete engine sound mod for the game replacing the default (and maybe even unused ones to be compatible with AgentY's Global Values mod) engine sounds and maybe also intakes and transmission sounds. Heck it'd be cool to see the EV sounds from Motorfest ported over as well since they all sound over-exaggerated on purpose but cool.
