Abgasanlage RACE 997, Edelstahl, Katleerrohre, EndrohreRace System Grand Am Spec. 997 3.6L & 3.8L Facts: - Headers - 3 x 45mm (1.77”) diameter tubing into a 1 x 70mm (2.75“) collector (reduces thermal stress) - Muffler - Interchangeable Cat Bypass...