304 V8 Exhaust Y-Pipe - JeepForum.com
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post #1 of 12 Old 05-27-2020, 09:19 PM Thread Starter
Hurricane4
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Looking for specifications on the CJ5 304 V8 OEM exhaust Y-Pipe - diameters ( inside and outside ) at/near manifolds and past the Y. Also wondering if a ‘74 CJ5 304 Y-Pipe has the same measurements as later years. Thanks.


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post #2 of 12 Old 05-29-2020, 01:11 PM
Nor Cal CJ5
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On the passenger side, there is a heat riser flap valve that maybe different on various years to make the Y-pipe length different. I think 1972 - 1974 are the same.

Here is a company that has Y-pipes for sale. No affiliation.

http://waldronexhaust.com/cart/index...oducts_id=4820
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post #3 of 12 Old 05-29-2020, 01:58 PM Thread Starter
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Thanks. Saw Waldron’s in another post a couple weeks ago. Have been talking with them - exchanged photos and dimensions. I ordered a Y-Pipe and tailpipe from them. Will post back regarding fitment. Looks like their product will work - way better bends than the Walker Y-Pipe.
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"The unbelievable we can do immediately . . . the impossible just takes a little longer."
My College Accounting Professor

"Success is not final. Failure is not fatal. It is the courage to continue that counts"
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Jeeps I Have Owned in Year Order:
'61 CJ5, '63 CJ6, '78 CJ5, '79 CJ5 (Current), '79 CJ7 & '86 CJ7.
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post #4 of 12 Old 05-29-2020, 03:47 PM
Nor Cal CJ5
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Quote:
Originally Posted by Hurricane4 View Post
Thanks. Saw Waldron’s in another post a couple weeks ago. Have been talking with them - exchanged photos and dimensions. I ordered a Y-Pipe and tailpipe from them. Will post back regarding fitment. Looks like their product will work - way better bends than the Walker Y-Pipe.
Let us know how it fits and works for you.

Does Waldron's differentiate between certain years?

Are you looking for a Y-pipe for a 1979 or 1974?

1972 CJ5 304 V8, 3 speed manual trans
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post #5 of 12 Old 05-29-2020, 05:00 PM Thread Starter
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This Y-Pipe is for my ‘79 CJ5 with the 304 V8 and factory exhaust manifolds. From talking with John at Waldron’s he said they have a Y-Pipe to fit up to a ‘76 CJ7 304 V8. He also stated the heat riser flap device on the passenger exhaust manifold shows on earlier years besides my ‘79. I also plan to modify the tailpipe with a 90 degree section to exit the exhaust out to the side behind the driver side rear tire. I will post the pics Waldron’s sent. Years ago when I had a ‘79 CJ7 with 304 V8 I used the Walker Y-Pipe 40376 - with Edelbrock shorty headers said to exit in the same place as factory exhaust manifolds. I had no problems fitting the Y-Pipe.
http://www.summitracing.com/parts/wlk-40376

"The unbelievable we can do immediately . . . the impossible just takes a little longer."
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Jeeps I Have Owned in Year Order:
'61 CJ5, '63 CJ6, '78 CJ5, '79 CJ5 (Current), '79 CJ7 & '86 CJ7.
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post #6 of 12 Old 05-29-2020, 05:10 PM Thread Starter
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OK - Here are the Y-Pipe photos Waldron's e-mailed to me. Both CJ5 & CJ7 Y-Pipes are pictured.

I also included an image of the Walker 40376 Y-Pipe - Looks like this is the first photo.

The Waldron's Y-Pipe is not perfect but at least 10 times better than the Walker Y-Pipe crinkled mess.
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WLK-40376_xl.jpg  
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"The unbelievable we can do immediately . . . the impossible just takes a little longer."
My College Accounting Professor

"Success is not final. Failure is not fatal. It is the courage to continue that counts"
Winston Churchill

Jeeps I Have Owned in Year Order:
'61 CJ5, '63 CJ6, '78 CJ5, '79 CJ5 (Current), '79 CJ7 & '86 CJ7.
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post #7 of 12 Old 05-29-2020, 05:22 PM
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Quote:
Originally Posted by Hurricane4 View Post
OK - Here are the Y-Pipe photos Waldron's e-mailed to me. Both CJ5 & CJ7 Y-Pipes are pictured.

I also included an image of the Walker 40376 Y-Pipe - Looks like this is the first photo.

The Waldron's Y-Pipe is not perfect but at least 10 times better than the Walker Y-Pipe crinkled mess.

I was unaware that they made a kit for the Cj7. Their stuff looks like good quality and have a stainless option which is nice.

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post #8 of 12 Old 05-30-2020, 10:46 AM
Nor Cal CJ5
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So your 1979 has the heat riser piece? I have one on my 1972 as well. Looks like these were used for quite some time. As long as the length of the piece is the same, that Y-pipe can be used for many years of Cj5’s.

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post #9 of 12 Old 05-30-2020, 12:24 PM Thread Starter
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Wow - I didn’t know the heat riser went back to ‘72. Good to know.

"The unbelievable we can do immediately . . . the impossible just takes a little longer."
My College Accounting Professor

"Success is not final. Failure is not fatal. It is the courage to continue that counts"
Winston Churchill

Jeeps I Have Owned in Year Order:
'61 CJ5, '63 CJ6, '78 CJ5, '79 CJ5 (Current), '79 CJ7 & '86 CJ7.
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post #10 of 12 Old 06-08-2020, 02:25 PM
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I know that the 1972-74 heat riser flaps were flat on both sides and about 7/8” thick. A separate doughnut gasket was used on the exhaust side to mate to the y-pipe flange. The later year heat risers integrated the gasket into the actual heat riser part (metal).

Does anyone know if the later heat riser part will work with the early 304 (72-74)?

1972 CJ5 304 V8, 3 speed manual trans
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post #11 of 12 Old 06-08-2020, 09:48 PM Thread Starter
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Found these photos of a Jeep exhaust damper from an eBay ad. Seller claims it is from a '73 Commando V8.
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"The unbelievable we can do immediately . . . the impossible just takes a little longer."
My College Accounting Professor

"Success is not final. Failure is not fatal. It is the courage to continue that counts"
Winston Churchill

Jeeps I Have Owned in Year Order:
'61 CJ5, '63 CJ6, '78 CJ5, '79 CJ5 (Current), '79 CJ7 & '86 CJ7.
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post #12 of 12 Old 06-09-2020, 11:23 AM
Nor Cal CJ5
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Quote:
Originally Posted by Hurricane4 View Post
Found these photos of a Jeep exhaust damper from an eBay ad. Seller claims it is from a '73 Commando V8.
Yes that is a later year heat riser replacement part. If he got it to work on a 1973 304, then that probably answers my question if it will work.

Thanks!

1972 CJ5 304 V8, 3 speed manual trans
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