6.4 Jeep SRT8 Exhaust Manifolds

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HardVG

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Has anybody tried running these:



Just thought they might make life a little easier in tight engine bays.
 
I don't know for certain that they would not work. BUT. The 6.1L SRT8 Jeep Hemi manifolds can be made to work with the Reilly Motorsports Alterkation but the won't work with the factory K member. The SRT manifolds require a bit of grinding, and the Alterkation requires a custom motor mount.

That manifold looks similar to the log type manifold found on the RAM trucks, those will NOT work as the collect points directly rearward and would put the collector right into the firewall.

Again all of this is speculation, if you have a set of the manifolds sitting around it wouldn't hurt to give 'em a try. Considering what TTI wants for a set of headers, I am certainly open to experimentation.

Regards,

Joe Dokes
 
You may be right about the exit, found this, presumably Jeep:



Then found this, seems to have plenty of turndown, but I'm thinking it is a different manifold:

IMG_4217.JPG


Reading more, this is the AEV wrangler conversion kit and uses 5.7 Jeep manifolds from 09-10 Commander, of course the later 5.7 manifolds do share the same exhaust port configuration as the 6.1 and 6.4 hemi.





Maybe not the best flowing solution but might work in tight places.

RH PN: 53013858AD
LH PN: 53013857AD
 
I think it pretty amazing that they get the kind of flow out of those tiny 5.7 manifolds to support the hp that they make.

I was looking at those 6.4 SRT manifolds when I was starting my Warlock project. I asked around over on the Grand Cherokee SRT site and no one really answered compatibility questions. The 1st gen GCSRT8 manifolds can be found cheap- alot of those guys swap exhausts around like you would not believe. I got mine for $70, and they are said to flow as well as any aftermarket headers.
 
Those Commander manifolds look very similar to the ones on my '09 Grand Cherokee, which is a stock 5.7. It is hard to get a good look at the shape because of the heat shield, but the exit angle looks the same.
 
Well, that's what I was trying to figure out, are they specific to the Commander or the same as the Grand Cherokee, what about the +09 car 5.7 Hemi?
 
The part numbers you listed earlier are the same as the ones in my 2009 Grand Cherokee parts manual for the 5.7 engine, the only thing that changed is the removal of the EGR valve which happened I believe after '07. It's the only parts manual I have so I can't say anything about compatibility for other years of the WK/XK platform or other platforms.

You could take the part number to the dealer and they can look up compatibility between platforms. I did something similar for the intake temp sensor that I was looking to use from a 6.4 Challenger on my 5.7. The sensor is longer putting it in the middle of the airflow which some are claiming it increases throttle response after a heat soak. I would love to know if the 5.7 Jeep logs would work on a 5.7 in an A-Body as that is my plan and don't want to drop money on headers if I don't have to.
 
ggt1_02 said:
The part numbers you listed earlier are the same as the ones in my 2009 Grand Cherokee parts manual for the 5.7 engine, the only thing that changed is the removal of the EGR valve which happened I believe after '07. It's the only parts manual I have so I can't say anything about compatibility for other years of the WK/XK platform or other platforms.

You could take the part number to the dealer and they can look up compatibility between platforms. I did something similar for the intake temp sensor that I was looking to use from a 6.4 Challenger on my 5.7. The sensor is longer putting it in the middle of the airflow which some are claiming it increases throttle response after a heat soak. I would love to know if the 5.7 Jeep logs would work on a 5.7 in an A-Body as that is my plan and don't want to drop money on headers if I don't have to.
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I've got 06 grand Cherokee 5.7 manifolds on my 05 hemi a body, and with some grinding, and solid biscuits on tti mounts they fit, but just barely. A lot of test fitting involved. I think the 11 model year was first for 6.4, and the new body grand Cherokee, so I'm not sure how similar they would be.
 
The earlier 5.7 manifolds will have the smaller square ports and are a different kettle of fish. My understanding is the 6.1, 6.4 and 2009 on 5.7 all share the same D-shaped exhaust port configuration with possibly some minor variances in EGR and such things. You can used the d-port manifolds on the earlier square port heads if you address EGR issues as the d-ports are bigger, but going the other way is not going to be the best for flow as you will be introducing a big restriction at the transition from head to manifold.
 
Ok, now we are getting somewhere:

2009-2010 Jeeps with 5.7 Hemi (Commander and Grand Cherokee)

Right PN: 53013858AD
Left PN: 53013857AD





2009-present Dodge and Chrysler cars with 5.7 Hemi (Charger, Challenger and 300)

Right PN: 53013848AE, 53013848AG
Left PN: 53013849AE





Car manifold looks like a nice piece.
 
Definitely right on the ports, I was thinking more as a comparison if outlet angle and stuff, since 06-10 would be same body with an engine change in 09. After looking at your pics of manifolds, the newer ones may interfere with the steering, depending on the car and engine placement. I had to grind the strengthening rib between ports out of the older style for clearance, may not be able to do that on the newer style. The cool part of manifolds is that they are cheap and easy to try out!
 

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Here is mine ground down, it would just depend on how much material is there, and the mounts and individual car (and builder) for the other manifolds. Unfortunately it may be a borrow a manifold and mock it up type deal.
 

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So the jeep ones may work, car ones probably wont, for our Aussie cars with the steering box on the other side and mounted on the frame rail behind the k-frame, the car ones are probably not going to work either.
 
That's what I'm thinking, but you never know for sure until you have one in your hands in your car. I've never even seen a right hand drive a body in person, so I am clueless in that regard :)
 
I did not realize so many manifold combinations existed......mostly Cast. I am installing a 2014 6.4 Challanger mill in my 64 Valiant. The manifolds are typical of most late model performance engines (I have been involved in CTS-V and Coyote transplants) all have factory stainless headers. In my build I cut the pipes off the flanges and rewelded them to work in my application (tight to the block)
 
64 hemi said:
I did not realize so many manifold combinations existed......mostly Cast. I am installing a 2014 6.4 Challanger mill in my 64 Valiant. The manifolds are typical of most late model performance engines (I have been involved in CTS-V and Coyote transplants) all have factory stainless headers. In my build I cut the pipes off the flanges and rewelded them to work in my application (tight to the block)
Click to expand...

6.4 in a 64 valiant...sounds like a good one....you will love it! what trans you going to run?
any pictures of the build so far? i have a 6.4 in my 1/2 gmc truck, I'm running the 5-45rfe trans
 
Little update, thought I would take a chance on a set of the late 5.7 car manifolds given that the motor is not going into a Mopar body. Basically, I think they will be a no-go for most applications, the late 5.7 exhaust ports do match the 6.1 setup as expected, but the manifolds do stick out too far, especially on the left side of the engine:



I think one of the problems is that in the modern car application, the exhaust needs to come over the pot of both the starter motor and the steering shaft.

The right side is a little more promising as the manifold does tuck a little tighter to the engine:



The overall width of the engine with these manifolds is too wide to fit between my frame rails, pretty much as is the case with the factory SRT8 headers.

Back to the drawing board of maybe the Jeep manifolds.
 
ralphie361 said:
Here is mine ground down, it would just depend on how much material is there, and the mounts and individual car (and builder) for the other manifolds. Unfortunately it may be a borrow a manifold and mock it up type deal.
Click to expand...

Ya know ive been screwing around with a set of these logs for months and they hit everything on the gear box in my 67 with aluminum box. I have no idea how you got that to not hit but id sure like to know before i spend a fortune on custom turbo exhaust tomorrow night.
 
turbofreek said:
Ya know ive been screwing around with a set of these logs for months and they hit everything on the gear box in my 67 with aluminum box. I have no idea how you got that to not hit but id sure like to know before i spend a fortune on custom turbo exhaust tomorrow night.
Click to expand...

man, those things are crying for some porting !
 
So the general consensus is that the 09-10 5.7 stock cast manifolds will work with most A-body swaps with a little grinding in certain areas as needed?
 
turbofreek said:
Ya know ive been screwing around with a set of these logs for months and they hit everything on the gear box in my 67 with aluminum box. I have no idea how you got that to not hit but id sure like to know before i spend a fortune on custom turbo exhaust tomorrow night.
Click to expand...

I'm not sure if I did much, as long as there isn't much variation in the tti mounts. I just used those, along with solid steel insulators instead of rubber. Mostly to keep the engine where it was, everything is really tight. The manifold I might have ground down around the steering box, and I still only clear it by 1/16" at most.
 
ralphie361 said:
I'm not sure if I did much, as long as there isn't much variation in the tti mounts. I just used those, along with solid steel insulators instead of rubber. Mostly to keep the engine where it was, everything is really tight. The manifold I might have ground down around the steering box, and I still only clear it by 1/16" at most.
Click to expand...

Its alright. Im going to a rack n pinion anyway cuz there is no room for anything in there. Then ill just flip a set of shorty headers for the the turbo setup. Thanks though. Took us about 4 hours of uping and dropping the lift to realize the imposibility of doing anything with the stock gearbox.
 
Did manage to pick up a set of Jeep SRT8 factory headers for the 6.1, this is looking promising (I'm not putting the engine into a Mopar body):







Little bit of clearencing required, which is also a good sign as we want these tucked nice and tight:



Time for another test fit.
 
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