stainless likes to crack but wont rust off(doesn't like vibrations), where as the aluminized pipe only lasts about 2 years in the rust belt states
so if you use stainless and its mounted very securely , you will have a long lasting exhaust
Stainless only rusts if it is a poor grade of stainless...same with cracking...there are many grades of stainless just like normal steel...I have a SS system on my truck right now and it looks like I just put it on...factory "stainless steel" is usually the low buck junk, aftermarket SS is usually high grade.
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