i have an apexi world sport cat back with a gutted cat and i took my muffler off at the last flange before the muffler, it sounds very good imo, i have an h22 so that may have something to do with it, its very deep and distinctive down low, and in vtec, wow. I like it. Ill get a vid. and to u sqidmaster, i dont think it is too bad, im sure its a bit distorted in the vid, it probably sounds better in person, ill let you know tho, over time driving your car with it like that will get on your nerves. I have been running mine like that for the past few months with my d series and h22, its loud.