Is hooker better quality then pacesetter?
As far as the flange at the collector; both are slip ons. No flange at all.
Oh, and my hooker ceramic coating lasted pretty well when I kept the car in the garage. It spent part of last winter outside and didn't fair too well. My uncle has the same hookers with ceramic coating and it is always garage kept. Rust all over the primarys right before the collector just like mine.
I'm going Kooks next round FWIW.
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Like staringback05 said, what does your wallet tell you? I'm sure if price weren't an option, we would all go with Kooks.
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While all of them I have installed had slip fit connections to the y-pipe. You can have an exhaust shop weld on flanges for about ~$20...
These are the Dynatechs with the slip fit collectors: (see how the primaries slip into the collectors then the y-pipe slips over the collector)
Also plan on getting GM MLS header gaskets too. The paper they come with is garbage. 
