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1989 Astro RS on a 1998 AWD frame with a 1994 350 TBI
7,383 Posts
Headers are after market, what you have are exhaust manifolds. No one makes headers for the 4.3 in the Astro/Safari. You can get most of the stock system on If you're looking for better performance than a custom Y pipe, and a turbo muffler is better than stock. There is a better tailpipe that came on the HO version of the 4,3 if you're wanting that I can find the part number in my notes.
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