I am not familiar with the grade 316? (for exhausts)
Typical grades of SS for exhausts are (cheapest first)
409
439/441
304 hot and cold ends
309 typicaly hot ends only.
Most aftermarket companies that make silencers from 304 offer lifetime warranties. I dont believe you are going to want anything better than 304.... should give you 5 years minimum life on the granny run, and 10+ years if you use your car regular on a decent run.
Typical grades of SS for exhausts are (cheapest first)
409
439/441
304 hot and cold ends
309 typicaly hot ends only.
Most aftermarket companies that make silencers from 304 offer lifetime warranties. I dont believe you are going to want anything better than 304.... should give you 5 years minimum life on the granny run, and 10+ years if you use your car regular on a decent run.