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post #1 of 8 Old 08-05-2013, 10:10 AM Thread Starter
cjlover1981
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Headers!

Hey guys i need help picking some headers for my 81 cj7 with a 304 v8. I want to know whats got the best sound and what are people most happy with??

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post #2 of 8 Old 08-05-2013, 02:52 PM
Jeeper44mag
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1978 CJ7 
 
Join Date: May 2013
Location: Tampa
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Still running stock here.

Luis

'78 CJ7, 304, ps, pb, A/C, ~3" Lift, 12.5"x33" MTZ's., T150/D20, D30/AMC20, 4.56.
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post #3 of 8 Old 08-05-2013, 10:01 PM
mattl
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1986 CJ7 
 
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Location: B'ham
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I've tried a couple of headers for my 360 and actually want to go back to stock. I have had issues with blown gaskets stemming from the mating surfaces not flat no matter how tight the bolts are. I also hate the rust on the 'ceramic coated' headers. It seems that it is hard to keep them rust free. I have Hedman headers now.
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post #4 of 8 Old 08-06-2013, 07:58 AM
Manhattan
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1981 CJ8 
 
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That part about "...and what are people most happy with?", I think you'll find the answer is stock manifolds - regardless if it's an AMC or SBC, etc. I had headers on a 360 - sounded great... when the gaskets were in tact. Similar to Matt's experience, the uneven surfaces, loosening bolts... the gaskets were an issue. And yeah, rust. Unless you drop a chunk of $$$, they're going rust.

1981 CJ8, Chevy 5.7, SM465, D300, RE 4.5, 35" BFG MTs, 20/30 4.56, Detroits, Warn 9500ti
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post #5 of 8 Old 08-06-2013, 08:00 AM
CSP
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The stock manifolds flow really well too. With the right muffler you can have the nice V8 rumble, if that's really what you're after going with headers.
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post #6 of 8 Old 08-06-2013, 08:38 AM
holliewood61
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1981 CJ7 
 
Join Date: May 2013
Location: Peterstown
Posts: 1,434
I run the heddman fender exit. I took them to my local machine shop and threw them on the belt sander to even up the mounting surface. I also took a cut off wheel and sliced the bridge between 1 and 2, and between 3 and 4 so they could all pull up individual of each other. a good set of gaskets and header bolts and no leaks here. hooked on a set of cheapo glass packs. shot a coat of vht header paint (several very generous coats on the headers) and we were good to go. love the sound.
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post #7 of 8 Old 08-06-2013, 09:39 AM
ASteve
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1972 CJ5 
 
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Location: Nor-Cal
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For what it's worth...I gotta say I have had no problems with my headers. I check the bolts every now and then but that's it. I recently changed out my Hooker Headers (20+ years old) to Dougs Headers and I am very happy with them. The mufflers I have are bit loud but sound nice. With my 304 the Dougs headers have 1 5/8" primaries with 3" collectors and I reduce them down to 2.5" connection to my Flowmasters.

Doug's Headers: http://www.summitracing.com/parts/do...view/make/jeep

Also, Piercy gaskets are a must, and don't over tighten the bolts or you will mess up the header flange.

Percy's: http://www.summitracing.com/parts/ph...merican-motors

Here's a link and sound clip to my set up: http://www.jeepforum.com/forum/f8/da...l#post15241248

SC
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post #8 of 8 Old 08-06-2013, 11:34 AM
mattl
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1986 CJ7 
 
Join Date: Jun 2008
Location: B'ham
Posts: 30
Great idea about splitting the connection between pipes. I never thought about it before, but makes sense.

1986 CJ7, AMC 360, NP435, D300, Tera60 w/Detroit, D44 welded, SOA, 37" MTR
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