[the head]

I went with them due to the fact that they are guaranteed to reduce noise by 5-7dB. That might not seem like a lot but the Banks was about as loud as I wanted to go. I think it is a little more noisy but after talking to Pciley on his striaght pipes, I decided that I wanted something in there rather than just straight-throughs. The stock resonators are 1.5" in diameter which is exactly the same diameter of the pipe going through the spiral flow. However (obviously), the body of the Moroso allows the rest of the flow to get through. I will grant you that these most likely don't flow as good as a straight pipe but I was willing to sacrifice a couple of hp to keep it a little more bearable inside the truck. In fact, I'm thinking about putting one of those cone-things (vortex?) in it on the Banks muffler exit and ditching the coffee can tip for a 90 degree bend to make it look more stock. Several people have also said that removing the Banks tip makes it a little quieter as well.

I compared several race mufflers but only the Morosos were guaranteed to hold the noise down to an acceptable level for almost all racing associations. Most of the straight "bullet" type mufflers don't do that. In fact, I wouldn't waste my money on them as a sound reducer and just run straight pipes if given that option. But that's just me.