Re: HO exhaust question
The 04s with the two cats only have different design than the precats of earlier. There were lots of complaints about resonance issues when 2-cat 04 owners started putting on Kolak exhausts. Even on my 02, running a gutted cat and a 4x14 Magnaflow was a bit much (not drone, just loud).
Due to my workload, please do not PM me as I do not regularly check my PMs. Thank you :)