ðɪ ˈɛndʒɪn hɐz θɹˈiː ˈɪnteɪk stˈeɪdʒᵻz, wˌɪtʃ ɑːɹ sˈaɪzd ɐkˈoːɹdɪŋ tə ðə sˈaʊnd kɹiːˈeɪɾᵻd baɪ ðə kəmbˈʌstʃən pɹˈɑːsɛs wɛn ɹˈʌnɪŋ.
The engine has three intake stages, which are sized according to the sound created by the combustion process when running.