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you may want to do a search. I've heard a lot of problems with header fit and having to modify (hammer) the tubes to make them fit. otherwise a good price.
Bought mine off his eBay auction a year and a half ago. I went without resonators since at that time they came with the reverse flow styled inserts and are tack welded which is an added headache to remove should you want to change the inserts to another brand and style.
Well worth the tweaks required to install for the price.
you may want to do a search. I've heard a lot of problems with header fit and having to modify (hammer) the tubes to make them fit. otherwise a good price.
my research has indicated more problems witht the hooker set-up than these. Ill be pulling the trigger on a set soon.
There is a really good write-up with pics and video that is still going. Might be a page back by now, but I think it is titled "Maximizer...something or other install. Maximizer and OBX seem to be the same company, or at least made by one and the same.
I installed a set this spring on my 80 4 SPD. They went on really nice and cleared everything so I did not have to dimple any of the pipes. One thing to note is the second bolt hole on the number one cylinder had to be elongated a little which is common with these headers. One other thing to mention is the copper header gaskets from summit don't work with these headers. I switched to Mr gasket large port gaskets and they seal perfect. I have the hooker max flow inserts in them.