i have 1 5/8" long tubes as well, dual 2" pipes and a Dynomax 17725 muffler with the crossover in it...but mines a 6...it used to be dumped, but now i have tail pipes, its still loud, sounds like a small 8 at idle, but once it revs up is another story, but the Tampa Cops didnt bat an eye at me as i left sonic one night, pinellas cops didnt mess with me either...
heres my sound clip...
http://threefortyduster.250free.com/dakotasound.WMV