5.2 header options - JeepForum.com

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post #1 of 32 Old 12-12-2010, 06:07 PM Thread Starter
NJSPEEDER
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5.2 header options

I was wondering what headers were out there for the 5.2?

Doing searches on all the normal parts sites(Jegs/Summit....) all I am seeing is the Edelbrock set up. Just wanted to know if there were any other shorty style header options that anyone had tried. I would even be happy with a set of generic street rod style shorty headers if anyone knows of a set that will clear.

If i can find an inexpensive set of headers with a 2.5 or 3 inch collector I can put my own crossover and y-pipe together easily enough, just don't want to go through the hassle of building headers from scratch or spending the extra cash on the Edelbrock if I don't have to.

Thanks
Tim


Tim Mullaney
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post #2 of 32 Old 12-12-2010, 06:44 PM
Osboy1
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PM Kolak, he gave me a quote for a header for the I6, wasn't too expensive. Mike Leach/Doug Thorley.
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post #3 of 32 Old 12-12-2010, 08:15 PM
newfieZJ
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NO cheap options for the ZJ V8 . Eddy's or Thorley's , both come with the piping to the cat . Even used they go for $400ish . Got mine for $250 off kijiji new , so , I guess you could get lucky too , but your jeep might be rusted out before that deal comes along again . I jumped all over that one and love em .

Now , that's not your only option to get more performance in this area . If you can find 1993 V8 GC manifolds , they are suppose to be as close to headers as you can get or at very least , flow much better . get those , fix the resticted area on the pass. side downpipe and you can gain almost or maybe equal the benefit for a fraction of the price .
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post #4 of 32 Old 12-12-2010, 08:35 PM Thread Starter
NJSPEEDER
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I was kind of figuring those would pretty much be the options. Ford and Chevy both have a million different cheap street rodder/block hugger headers, I guess the MOPAR crowd just isn't as lucky.

For the prices that even used pipes go for I will just end up fabricating better down and y-sectors myself with tubing from a local shop.

Thanks guys
Tim

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post #5 of 32 Old 12-13-2010, 01:21 AM
tonymartin
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is it true that removing the crushed part in the y-pipe will give you a similar effect to headers? Not sure where I read/heard this but I do remember it.

Also, there is one guys on here, -cAcHe- who was supposed to be making some custom sets and selling for about 400. He said he would let me know when he makes them but I am not sure what happened to him.

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post #6 of 32 Old 12-13-2010, 01:27 AM
ratmonkey
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Hedman tight tubes block huggers. See my build thread.
Sanderson also makes a block hugger that requires only a minor frame notch on the pass side.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #7 of 32 Old 12-13-2010, 07:40 AM
newfieZJ
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Quote:
Originally Posted by ratmonkey View Post
Hedman tight tubes block huggers. See my build thread.
Sanderson also makes a block hugger that requires only a minor frame notch on the pass side.
Although true , you could use these , what about the y-pipe ? $300 isn't bad for the headers , but any shop I know would want at least a couple hun more to fab a Y-pipe back to the cat . As you know , relying on others to do it right doesn't always work . How much did it cost you to get it done wrong your first time ? No offence , just making a point , lord knows how many times I had stuff done wrong and paid out the *** for it .

On your build , you have no choice , you have to go with what works . The cost , not much less than a few bucks and alot more trouble than the Eddy's . Just getting it to the shop would be a PITA unless you paid them to install the headers too . Labour would suck up any money saved and then some .

Sorry RM , that base of $300 sounds great , until you look at it closer
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post #8 of 32 Old 12-13-2010, 06:04 PM
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If you find a not so lazy shop it puts things at edelbrock prices with a better y pipe so long as you use the flowmaster merge.

I spent about 75$ on the pipe to do it right the second time.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #9 of 32 Old 12-13-2010, 07:47 PM
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I have a 93, so I'm better off fixing my crushed Y-pipe and tail pipe than getting a set of Doug Thorley's?
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post #10 of 32 Old 12-13-2010, 10:07 PM Thread Starter
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newfireZJ - I'm not worried about making the y-pipe myself, it is only a few bucks of tubing and i know how to weld/do light fabrication. I just don't want to make headers, I have put together weld up kits before and i just don't have that kind of time to spend cutting and splicing.

ratmonkey - Thanks man, i will have to check out your build


-Tim

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post #11 of 32 Old 12-13-2010, 11:00 PM
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Quote:
Originally Posted by wickerham View Post
I have a 93, so I'm better off fixing my crushed Y-pipe and tail pipe than getting a set of Doug Thorley's?
I would highly doubt the '93 manifolds are significantly better than later ones, especially considering only the passenger side manifold was changed between '93 and '94.

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post #12 of 32 Old 12-13-2010, 11:46 PM
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Quote:
Originally Posted by newfieZJ View Post
NO cheap options for the ZJ V8 . Eddy's or Thorley's , both come with the piping to the cat . Even used they go for $400ish . Got mine for $250 off kijiji new , so , I guess you could get lucky too , but your jeep might be rusted out before that deal comes along again . I jumped all over that one and love em .

Now , that's not your only option to get more performance in this area . If you can find 1993 V8 GC manifolds , they are suppose to be as close to headers as you can get or at very least , flow much better . get those , fix the resticted area on the pass. side downpipe and you can gain almost or maybe equal the benefit for a fraction of the price .
hmm, i never new that about the 93's, i just scrapped mine. maybe thats why i didn't get as big of a gain as i was expecting with the eddys.

if i were to buy headers again i would probably go with thorleys, i like the design better, i tried getting them, but they guy at mopac said they were discontinued. or i forget the brand, but getting block huggers and fabbing a longer y

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post #13 of 32 Old 12-13-2010, 11:48 PM
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Quote:
Originally Posted by wickerham View Post
I have a 93, so I'm better off fixing my crushed Y-pipe and tail pipe than getting a set of Doug Thorley's?
nah, get the thorleys, you wont be disappointed

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post #14 of 32 Old 12-14-2010, 12:11 AM
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Originally Posted by CatSplat View Post
I would highly doubt the '93 manifolds are significantly better than later ones, especially considering only the passenger side manifold was changed between '93 and '94.
Collector is larger on both sides in the 92-93 5.2 manifolds. 2.25" vs 2.0".

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #15 of 32 Old 12-14-2010, 08:00 AM
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Just to clarify:

92-93 manifolds - they can be from any truck, van, or whatever has 360/318 stock. And most of the 93 v8 zjs

with the larger collector size they flow much better (almost as good as shorty headers)

If you want the best flow using manifolds get a RS 1968-70 dodge 340 mani and LS 92-93 mani

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