A Quality stainless steel system / muffler, will usually last the life of the car.
- Advantages of stainless steel:
- Long life against corrosion.
- Fully welded seams, to prevent seam leaks.
- Excellent for people who tend to use their cars for short trips, which rusts out mild steel mufflers!!
In the long term, if you intend to keep your car for 5 years or more, stainless steel systems will be a much better investment.