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Unread 08-05-2013, 10:10 AM   #1
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Join Date: Oct 2012
Posts: 8

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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Unread 08-05-2013, 02:52 PM   #2
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1978 CJ7 
Join Date: May 2013
Location: Tampa, Florida
Posts: 180
Still running stock here.

Had: '75CJ5 (back when they still made them), '76CJ7, '99 TJ.
Have: Metallic Silver '78 CJ7 Golden Eagle, 304 V8, ps., pb., A/C, ~3" Lift, 12.5"x33"x15 BFG AT's., T150/Dana20, Dana30/AMC20, 4.56 gearing, white hardtop.
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Unread 08-05-2013, 10:01 PM   #3
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1986 CJ7 
Join Date: Jun 2008
Location: B'ham, Alabama
Posts: 28
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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Unread 08-06-2013, 07:58 AM   #4
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1981 CJ8 
Join Date: Dec 2011
Location: Atlanta, GA
Posts: 482
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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Unread 08-06-2013, 08:00 AM   #5
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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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Unread 08-06-2013, 08:38 AM   #6
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1981 CJ7 
Join Date: May 2013
Location: Peterstown, wv
Posts: 840
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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Unread 08-06-2013, 09:39 AM   #7
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1972 CJ5 
Join Date: Oct 2009
Location: Nor-Cal, California
Posts: 1,577
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

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Unread 08-06-2013, 11:34 AM   #8
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1986 CJ7 
Join Date: Jun 2008
Location: B'ham, Alabama
Posts: 28
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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