They are just way too loud for me even with the stock H. I guess I should have got the Magnaflow cat-back to get something a little quieter. I was hoping for a sound similar to my old 5.0 Fox with a Bassani catted X and a Bassani cat-back. These stingers just absolutely scream and I'm nott looking to get quite so much attention. Anyway, after spending $700+ on this cat-back I am sick to my stomach. Maybe I'll get used to the stingers, I don't know. I've only put about 40 miles on them so far. I have a feeling they'll be up on the market here soon.