ramrod;c-142955 wroteUnless your original manifold is cracked, which I bet it isn't, don't waste your money. The standard manifold actually flows the same if not awfully close to a header, not worth the cost. I saw a youtube video of a dyno run before and after, no difference at all.
Let me know if you want the video
my original manifold is fine im just doing the exhaust figured it would be a good time to grab some extractors if i could find some cheaper used ones i wasn't expecting any kind of gain other then maybe a nicer exhaust note