Hey Bros... I read an article about removing the silencer ring on my 2004 600 turbo to get better sound out of that thing and so I did. I was told it would'nt effect performance and that this was something dodge ordered from cummings to keep the whistle down. So I went ahead and removed the snap ring and silencer ring. For several day's it sounded great! Then one cold day i took it out for a spin and the damn thing sounded like a big hoover vacum cleaner from hell. Not sure if it was the cold air effecting it or not...Has anyone tried this or heard of it???? thanx for any info...!!!!