Minnesota Classic Glastron Forum

General Category => General Discussion => Topic started by: nes-cv23 on May 16, 2023, 10:03:53 AM

Title: Olds 350-455 exhaust manifolds.
Post by: nes-cv23 on May 16, 2023, 10:03:53 AM

I could use some new exhaust manifolds for my jets, but I?m only finding 455 manifolds,  I thought olds used the same manifolds for both, but I?m not sure.. anyone out there know the diff?     I know chev and fords use different ones for there big blocks and small blocks.

Title: Re: Olds 350-455 exhaust manifolds.
Post by: carlsoncvx18 on May 16, 2023, 02:55:15 PM

I am thinking the 350 & 455 take the same exhaust manifolds.

Title: Re: Olds 350-455 exhaust manifolds.
Post by: Hyperacme on May 16, 2023, 03:28:41 PM

GLM ..
https://www.glmmarine.com/product-manifolds.html

CP Performance ..
https://www.cpperformance.com/

Title: Re: Olds 350-455 exhaust manifolds.
Post by: thedeuceman on May 16, 2023, 08:05:24 PM

Although they are similar design in that the center two ports are Siamese, they are different.


Sent from my iPhone using Tapatalk Pro

Title: Re: Olds 350-455 exhaust manifolds.
Post by: ccv-19 on May 18, 2023, 04:28:14 PM

 Never seen Marine manifolds just for 350 Olds.
 The ones I have seen are listed 350-455
 455 gaskets and heads are not all the same.
 The Marine manifolds use the larger port gaskets.
I like the Remflex ones they work great on  surfaces
that are not perfect.

Title: Re: Olds 350-455 exhaust manifolds.
Post by: ccv-19 on May 18, 2023, 04:59:00 PM

 The smaller port gasket might work better on a 350 head.

Title: Re: Olds 350-455 exhaust manifolds.
Post by: nes-cv23 on May 21, 2023, 07:58:44 AM

Yes. That is the difference on exhaust.   Same manifolds, diff gasket. Now I just need to find a bell housing. Same problem, all I?m finding is for 455. But I think there the same also. I need to find a Oldsmobile man who can give me the advice I need.    Anyone?

Title: Re: Olds 350-455 exhaust manifolds.
Post by: ccv-19 on May 21, 2023, 09:10:11 AM

 
       Same bell housing . The engine block on the 350 is a little shorter than the 455