Just got this for the Omni. 3" from TU with a stainless magnaflow muffler and magaflow cat. Hope to have it installed by the end of the week. Just curious if anyone has driven a 16v vs a 8v with 3". The car sounds different anyways, so I am curious too see how much different an 8v sounds. When I pull the motor to swap in the T2/555 I will probably add a 3" swing valve with a 3" down pipe, but for now I will enjoy this.