Summit Headers
#1
Summit Headers
Hey guys, im new here, but I thought i would chip in this bit of info. I bought a set of summit shorty headers for my '89 5.0 cause my manifolds were cracked and im too cheap to buy some good headers. First off, when i got them and took them out of the box they say FlowTech right on them. Now as i got ready to put them on, i decided to skip the cheap gaskets that came with them and get a set of Mr. Gasket Copperseal gaskets. So I started putting them on, they were a pain just like headers are supposed to be, but when i fired it up they were leaking like a busted water main. I kept tighting the bolts until they wouldnt tighten no more, and they still leaked. so off they come. I took a look at the gaskets, and in the corners of the ports there handnt been anything touching them. the flange on the headers is kind of oval instead of square. this is getting long so i will get it over with. I used the gaskets that came with the headers and no more leaks! so anyway, im happy now except the paint is already gone, oh well.
as for performance improvement? I dunno, but they sound a little different.
as for performance improvement? I dunno, but they sound a little different.
#2
#3
The ports on the headers were just about the same size as the ones on the stock manifolds, they just werent perfectly square. I was thinking maybe the Summit ones are flowtech 2nds? the paint on them (what little they had) is totaly gone and the welds were kinda ugly. at least they have 3/8" flanges, the dynomax headers I have on my other truck only have 1/4".
#4
I hear ya on the Flow tech/Summit headers.When i had shorties on my truck i did the same thing you did.I ordered them because my manfold was cracked.When i got them i was like...... HUH Flowtech?
I also went with the copper seal gaskets.....$30 down the drain. They sucked...period! Leaks everywhere.
I finally went with Felpro HP gaskets....Good to go!
I also went with the copper seal gaskets.....$30 down the drain. They sucked...period! Leaks everywhere.
I finally went with Felpro HP gaskets....Good to go!
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