Yes its got be the muscle. A 96 corvette with racing exhaust and all engine tune sounds like thunder at idle - 3000 rpm then it starts sounding pure V8 until the 8000 redline when it sounds like a nascar. As for stock cars......hmm. RUF CTR2, Vector M12(is that wat its called?), SVT Cobra, 97 Camaro SS, 96 Z28, Cobra 427, Charger, HEMI CUDA!!!! this ones nice, mercury cougar, impreza 22B. Mentions go to S2000 with racing exhaust, lancer(its like pure inline 4 noise, very nice), integra type r with racing exhaust, BMW 328, alfa 156, FTO(very unique V6), TOYOTA SUPRA(i love that noise. no car can recreate a supra engine noise). My current all time favourite: 82 corvette!!! no its not the most powerful car in the game, not even close. but hearing that engine pull to high rpms puts a smile on my face.