I was having a safety inspection done on my bird in preparation for a trip to the strip. I noticed that one of the mufflers had a 1 1/2 inch rusted out hole in it. This is from DynoMax's cat-back which I installed in August of 2001. Sheesh, I would have expected better than 20 months of life out of these mufflers. Anyone else had a problem with DynoMax?