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From what I've read, when the Pacesetter longtubes first came out for the LT1 there were issues with the #2 tube not being angled correctly and it wouldn't clear the AC hard line or something like that. Their original mid length headers were a thinner gauge metal and had some other issues as well. It seems like the Hooker and JetHot headers got a little worse while the Pacesetters got a little better.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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