Speaking of exhaust.......

[strokerpost]

Is there anyone in the aftermarket repopping H.P. (magnum) exhaust manifolds?

 

[commando1]

You'll have to do your home work to see which of these were also used in your C-body application.

https://www.yearone.com/Catalog/196...t/exhaust-manifolds-.-reproduction/?year=1969

Personally, I would find a reference chart on line or get the P/N's from a Parts Book and scour the internet. They are all out there.
Even long rams.

 

[strokerpost]

:sSig_thanks: for the link. Ill have to dig up some part numbers and exercise my search skills.

 

[commando1]

There's many, many, reference charts online.
Here's one:
http://www.mymopar.com/extcastnumb.htm
Not one of them is 101% accurate. Cross reference through as many as possible.

 

[strokerpost]

Thanks again.

 

[commando1]

Thanks again.

Just hit the THANKS button.... :rolling:

 

[300rag]

Just hit the THANKS button.... :rolling:

Ya but that doesn't up the post count :grin:

 

[bajajoaquin]

Since you can't see the casting numbers clearly, I reached out to YearOne today. Here's their reply:

HP689LH (Drivers Side)

INFO 17 (I) TECH INFORMATION
INFO 18 (I) Includes casting number 2843992 and pentastar as original.
INFO 19 (I) Pentastar is cast upside down as original.

HP689RH (Passenger Side)

INFO 17 (I) TECH INFORMATION
INFO 18 (I) Includes casting number 2806900 and pentastar as original.

According to the Mymopar.com casting numbers page, those are '68-'69 Magnum castings. Anyone know if they work on '67s? Did they change castings for performance or for fit?

 

[1966newport]

ds c body manifold is not same as a b body. ps is same as a b body

 

[bajajoaquin]

Good point. I see a different casting number for regular C body manifolds but not for Magnum manifolds. Do those get different castings as well?

On another (related) topic, I talked to a guy about doing a run of these. Best case, you could break even with 25 sets, but it could also be 60 sets. That would mean you're out somewhere between $30k and $72k, and you wouldn't even make a nickel in that case.

No wonder the manifolds are marked "not eligible for discount" on the website!

 

[1966newport]

ps is same number, ds is number for c body only