TTI Exhaust Longevity

I'm on my second year with my TTI's which are polished and ceramic coated. By no means is that enough time to tell whats ahead but they still look great and I bought stainless steel Magnaflows instead of the Dynamax mufflers. Just like the sound better, that's all! The mufflers should last quite a long time being 304 stainless and polished. I hope!