About how long does stainless steel last? I have duals on my F-150 that I had put on in January of 1997.

 

That type of system should last a long time. My dodge that i drove for 10 yrs had a stainless system on it. It looked like it could go another 10 yrs.

 

Depends on the stainless. Most aftermarket systems are 304. They'll most likely last as long as your vehicle. I've seen OEM "stainless" systems that don't last very long, but who knows what type of stainless they're using.

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99 XLT Black Ex-cab, Flareside, 5.4, ORP, 3.73, Gibson Supertruck, K&N, Superchip, WMS Velocity Tube, Modified Airbox, Slap-Free Motor at @19k