So, in preparation for installing a stage 1 exhaust upgrade, I removed the exhaust system. I'm not sure how much is stock, I think the exhaust manifolds and the crossover pipe is original. The exhaust itself seems to include som stock-ish parts, welded together with some unoriginal parts, and now pretty rusted out.
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So, what do I do with this? Is it all just worthless at this point? Is it worth holding on to?