Headers for CJ5
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Headers for CJ5
- Thread starter MikeMc
- Start date Start date:
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johnbilt
Jeeper
- Posts
- 245
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- 1
- Location
- Alaska
- Vehicle(s)
- 1973 CJ5 - AMC360 /EB Performer intake / Isky Cam / Holley Carb - T18 - D20 w/2.41 Low - 4.56 Locker Rear and Front Pwr-Lok.
I had the same setup in my 73CJ for many years. I always had the fenderwell headers with the mufflers under the floorboards and the exhaust in front of the rear tire. This is a popular and easy setup. I would look for the headers with the thick flange. This helps keep the headers tight. I did have problems with hot floorboards and little rocks that get caught in the top of the headers which rattle a bit.
I upgraded to a full exhaust out the back quite awhile back and I've been much happier with that. I used the stock manifolds and tucked the pipes up parallel with the frame. Quieter and a better system I think. The short headers usually found for Jeeps aren't really tuned for low end torque.
I upgraded to a full exhaust out the back quite awhile back and I've been much happier with that. I used the stock manifolds and tucked the pipes up parallel with the frame. Quieter and a better system I think. The short headers usually found for Jeeps aren't really tuned for low end torque.
Darren9975
Jeeper
I also had fender well headers with turnouts just in front of the rear tires, I switched to inframe headman headers and had them ran out the back. I like this setup a lot better, much quieter and less fumes.
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- 74
- Location
- Plumas Lake, CA, USA
- Vehicle(s)
- 1974 CJ5 ~ Fresh built AMC 360 - SM420 - D20 - D30F with upgraded 30 spline shafts and knuckles & D44R - 4.27 Gears - ARB Lockers F/R - All chrome molly axles - on 33's - YJ 4" Lift Spring Conversion
I have the cheap summit fenderwell headers for same year make model etc with xherry bomb mufflers. (yeah wanted it loud, im still young and dumb 
)
The cheap headers constaintly leak from the head to header. There are a lot of issues with this. Im currently on my 3 rd gasket set, have bought stage 8 locking header bolts, and still just blew a hole in the fasket again.
I may have a warped head or header flange, going to try another idea next, but mentioning all this as warning. Get what u pay for. Im paying for the cheap headers now...
But exhaust leaks are very common with headers fir our jeeps / AMC 304 ...
)The cheap headers constaintly leak from the head to header. There are a lot of issues with this. Im currently on my 3 rd gasket set, have bought stage 8 locking header bolts, and still just blew a hole in the fasket again.
I may have a warped head or header flange, going to try another idea next, but mentioning all this as warning. Get what u pay for. Im paying for the cheap headers now...
But exhaust leaks are very common with headers fir our jeeps / AMC 304 ...
Darren9975
Jeeper
Copper gaskets! Only way to go. I haven't had to change mine in three years.
Niedhogg
Old Time Jeeper
- Posts
- 1,317
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- Location
- Thor, Iowa
- Vehicle(s)
- '79 Jeep CJ7 Renegade with 304ci V8, TH400 auto, Quadratrac T-case, Stock 20 and 30 rears with no mods yet, not sure of the gear ratio.. 4" Softride Superlift, w/widetrac shock towers and 35x12.50x15 BFG Mud-Terrains
'76 CJ5, 232 ci, T-150 3-speed, D20 T-case, Corp. 20 rear w/full float axles and lockout hubs and Detroit auto locker, D30 front w/lockout hubs, gear ratio is unknown..
I too, got a set of cheap Summit headers (Flowtech), only mine are full length inside the frame rails, and I'm also going out the back with Flowmasters and 2-1/2" pipes..
View attachment 7310
View attachment 7311
plenty of clearance..
View attachment 7310
View attachment 7311
plenty of clearance..
- Posts
- 5,829
- Media
- 186
- Resources
- 1
- Thanks
- 74
- Location
- Plumas Lake, CA, USA
- Vehicle(s)
- 1974 CJ5 ~ Fresh built AMC 360 - SM420 - D20 - D30F with upgraded 30 spline shafts and knuckles & D44R - 4.27 Gears - ARB Lockers F/R - All chrome molly axles - on 33's - YJ 4" Lift Spring Conversion
Darren9975
Jeeper
I got mine from summit racing
Darren9975
Jeeper
- Posts
- 5,829
- Media
- 186
- Resources
- 1
- Thanks
- 74
- Location
- Plumas Lake, CA, USA
- Vehicle(s)
- 1974 CJ5 ~ Fresh built AMC 360 - SM420 - D20 - D30F with upgraded 30 spline shafts and knuckles & D44R - 4.27 Gears - ARB Lockers F/R - All chrome molly axles - on 33's - YJ 4" Lift Spring Conversion
So i was looking at that, and while i know all amc v8 heads /header flanges should be the same, it will not show AMC 304 ???
I did find these aluminum ones though
Percy's High Performance 66044 - Percy's Seal-4-Good Header Gaskets - Overview - SummitRacing.comSame basic principal yes? Or is there an advantage to copper over aluminum? Or vise versa?
Not trying hijack thread, figured be good info for op too...
Ill link u the stage 8 bolts you'll want when on computer tomorrow... Im on this i phone and screens a little small...
Niedhogg
Old Time Jeeper
- Posts
- 1,317
- Thanks
- 0
- Location
- Thor, Iowa
- Vehicle(s)
- '79 Jeep CJ7 Renegade with 304ci V8, TH400 auto, Quadratrac T-case, Stock 20 and 30 rears with no mods yet, not sure of the gear ratio.. 4" Softride Superlift, w/widetrac shock towers and 35x12.50x15 BFG Mud-Terrains
'76 CJ5, 232 ci, T-150 3-speed, D20 T-case, Corp. 20 rear w/full float axles and lockout hubs and Detroit auto locker, D30 front w/lockout hubs, gear ratio is unknown..
So i was looking at that, and while i know all amc v8 heads /header flanges should be the same, it will not show AMC 304 ???
I did find these aluminum ones though
Same basic principal yes? Or is there an advantage to copper over aluminum? Or vise versa?
Not trying hijack thread, figured be good info for op too...
Ill link u the stage 8 bolts you'll want when on computer tomorrow... Im on this i phone and screens a little small...
Something else to keep in mind while ordering header bolts, there are two different sizes needed for the AMC heads, so when you order your headers and they say bolts are included, there's about a 99% chance they will all be the same size and you'll have to buy different ones anyway.
Darren9975
Jeeper
There is two types of heads dogleg port and regular. Make sure which ones you have, they are most likely doglegs.So i was looking at that, and while i know all amc v8 heads /header flanges should be the same, it will not show AMC 304 ???
I did find these aluminum ones though
Same basic principal yes? Or is there an advantage to copper over aluminum? Or vise versa?
Not trying hijack thread, figured be good info for op too...
Ill link u the stage 8 bolts you'll want when on computer tomorrow... Im on this i phone and screens a little small...
- Posts
- 5,829
- Media
- 186
- Resources
- 1
- Thanks
- 74
- Location
- Plumas Lake, CA, USA
- Vehicle(s)
- 1974 CJ5 ~ Fresh built AMC 360 - SM420 - D20 - D30F with upgraded 30 spline shafts and knuckles & D44R - 4.27 Gears - ARB Lockers F/R - All chrome molly axles - on 33's - YJ 4" Lift Spring Conversion
Yes that is true. Had a heck of a time getting the right ones. Thought someone had re threaded one first time i found out.
CJ
Admin
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- Location
- Central FL
- Vehicle(s)
- '72 CJ5, 401, T18, D20, D44, D30
'82 CJ8, 258, D300, AMC20, D30
All v8 heads from 1970 (gen 3) and on have dog leg ports, rectangular port heads (gen 2) need intake and head mods to fit on gen 3 engines.
- Posts
- 5,829
- Media
- 186
- Resources
- 1
- Thanks
- 74
- Location
- Plumas Lake, CA, USA
- Vehicle(s)
- 1974 CJ5 ~ Fresh built AMC 360 - SM420 - D20 - D30F with upgraded 30 spline shafts and knuckles & D44R - 4.27 Gears - ARB Lockers F/R - All chrome molly axles - on 33's - YJ 4" Lift Spring Conversion
As promised: Stage 8 Locking Fasteners 8918S - Stage 8 Locking Header Bolt Kits - Overview - SummitRacing.com
Those are the correct 2 different size bolt set...
For Headers, mufflers etc:
Summit Racing – High Performance Car and Truck Parts l Edelbrock, ACCEL, Moroso, K&N, MSD, Holley & More!
And of course there are our sponsors, whom you can get a member discount from.
~ JR
Those are the correct 2 different size bolt set...
For Headers, mufflers etc:
Summit Racing – High Performance Car and Truck Parts l Edelbrock, ACCEL, Moroso, K&N, MSD, Holley & More!
And of course there are our sponsors, whom you can get a member discount from.
~ JR