olds 350 exhaust pipes

[bill]

Heres a good info page on the subject

http://www.442.com/oldsfaq/ofexm.htm#Exhaust Manifolds 1964 - 1990

 

[DoubleV]

Here is one I still have off, or a pair the LH side is normal Olds, the RH side is the one to look for:

That is an unmatched set of manifolds. The Z manifold pictured at the top is for a big block and will not work on a small block. The #1 manifold pictured below is just a standard drivers side small block manifold ( before they introduced the one with the heat riser valve on the 307's ). The #1 will fit on a big block but with the much better W/Z manifolds available for the big blocks, not many would bother with running SB manifolds.

 

[dave1978]

So you are saying if I run 79-85 Toro with a 307 or 77-78 Toro with a 403 rt side manifold then it would possible to run real duel exhaust.My existing left manifold would be fine?

 

[DoubleV]

You don't need any special exhaust manifolds to run dual exhaust. All you need to do is block off the crossover port on the passenger side manifold. That's the way it was done from the factory years ago. Any exhaust shop can do this for cheap.

Now if you want to run the Pypes downpipes, you have to run the #4 passenger side manifold and the #1 drivers side manifold ( the #14 307 manifold with the heat riser valve MIGHT work ).

 

[Bar50]

1982 Olds, 455 Olds, TH350 Big Radiator out of the donor Toronado, I cut the bottom of the core support out to clear the tanks.

Sorry, it has been sitting dormant for about two years(critter nest on the engine):

Not a good way to see it, I'll dig it out and lift it up for a better pic if the weather holds out for a few days.

Tried to get a close up of the exhaust:

The RH side manifold from a Toro curves out and back.

It fits, pics prove it.

455 Olds engine is sitting on 307 mounts. Used a double hump exhaust cross member from a B-body big car GM because it was the only one I found as wide as G-body frame rails. I whacked the trans mount off and re-located it to fit the car better.

 

[DoubleV]

Yeah, if you have a big block, things are a bit different, but I think the OP has a small block. Since you have a big block, you should run the matching W drivers side manifold on it. In other words, if you're running a big block Olds in a car and want to run manifolds, run the W/Z manifolds hands down.