How To Cure a "Rappy" Exaust?

I had the same problem on my 91 GMC, I had 2.5" duals straight out the back like you with long cherrybomb glasspacks, I put some 3.5" dia by 14" long chrome tips on, took the tommy gun sound away, make sure they have the rolled lips, made my 350 sound like a big block

Thanks! I'm guessing this is due to the length of our truck exhausts and I'm glad to hear I'm not the only one to experience this. The "Tommy Gun" sound is exactly what I'm experiencing and it's very attention getting.

When you say rolled lips, do you mean rolled in to the tip? Got a link to a product? I haven't seen tips that long here at the local parts places. Just the short fat "fart can" import crap.