Was wondering how these hold up against time and constant use? QTP or any other companies that make these cut off's.

I was just watching some videos on you tube, and even the ricer cars sound pretty good with these. I would think that the carbon and stuff might bind these things up??

What are your thoughts?

there was a post on here awhile back that talked about these, and alot of what I have heard on this peticular item is that they wear out relatively fast!
Neil