New Exhaust Manifold
Fits 41-53 Jeep & Willys with 4-134 L engine

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New Exhaust Manifold
Fits 41-53 Jeep & Willys with 4-134 L engine
New Exhaust Manifold

Newly cast complete exhaust manifold. Bolts up just like original - Highest quality guarantee.

Heat riser kit comes with new shaft, bushings, washer. Acted as an early way of warming up your motor in cold conditions. Opens flap as motor warms.

4-134 L engine

41-45 MB
41-45 GPW
46-49 CJ-2A
49-53 CJ-3A
50-52 M38
46-49 Truck
46-49 Station Wagon
48-49 Jeepster

Item # Price

Availability: In stock

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Questions: The rocker-arm of the Heat Riser is missing on my MB, but the shaft is still present in the manifold. Is it possible to purchase the weighted rocker arm separately? or do I have to purchase a whole new Exhaust Manifold?
Question By: Alex Beart on Jul 1 2020 12:18 PM
637219 is the counter weight part number.
Answer By: Willys Jeep Parts Tech on Jul 1 2020 5:41 AM
Questions: Is just the stud off the exhaust manifold available it appears mine sheared at the exhaust connection.
Question By: Justin Wesley on Oct 26 2019 1:48 AM
That I would go back and use a standard bolt on.
Answer By: Willys Jeep Parts Tech on Oct 28 2019 5:35 AM
Questions: One of your answers says the only other possible part would be 639743,the valve stop. Mine is good still. So does it come with gaskets then?
Question By: Jack on Mar 19 2019 5:29 PM
A7835 is the part number for that. It is separate.
Answer By: Willys Jeep Parts Tech on Mar 19 2019 10:48 AM
Questions: The heat riser kit doesn't include the flapper according to the pictures. Does the manifold come with a flapper and is the heat riser kit and flapper installed, or are they separate?
Question By: Dave Kuhlman on Jan 30 2019 6:20 PM
The flapper is installed with it. It may just be the way the photo was taken.
Answer By: Willys Jeep Parts Tech on Jan 30 2019 12:06 PM
Questions: does the heat riser kit come as part of the exh. man.?
Question By: jimbob on Oct 24 2018 3:34 PM
yes, that is correct, it does.
Answer By: Willys Jeep Parts Tech on Oct 24 2018 12:44 PM
Questions: Do I need to buy any additional parts for the heat riser, or do I just bolt it on as is?
Question By: Kade F. on Dec 17 2017 4:34 AM
639743 is the only other item i would get to complete the assembly.
Answer By: Willys Jeep Parts Tech on Dec 18 2017 5:56 AM
Questions: In Stock?
Question By: Tom Luniewski on Jun 8 2017 3:00 AM
Yes, these are.
Answer By: Willys Jeep Parts Tech on Jun 8 2017 6:00 AM
Questions: on the exshast manifold where the tail pipe hooks on, is that a stud that can be replaced?, this is on a 1951 cj 3a, l-134engine. thanks john c.
Question By: john carllson on Mar 21 2014 12:00 AM
Yes is can be screwed out and replaced if needed.
Answer By: Willys Tech on Mar 24 2014 12:00 AM
Questions: Hi- I noticed that the hole, closest to the firewall is broken on our jeep. The manifold is sorta jury rigged, but seems to work ok. To replace the manifold, are there just three bolts or is there a hidden middle bolt that is not showing in this picture. -Thanks Peer
Question By: Peer on May 9 2011 12:00 AM
The intake and exhaust manifolds share bolts so that is correct.
Answer By: Willys Tech on May 9 2011 12:00 AM