Thorton W Z manifolds on 455 in '87?

[RocketGremlin455]

Ok. Was on the Thorton site. I'm about to start parting out my 73 and the first thing the proceeds are going towards is exhaust for my BBO swap. I JUST can't see spending $600 on Gbody swap headers to install my 455 in my 87 Cutlass. Are these Thorton W & Z manifolds the ones people are using to install BBO's in Gbodies? Any other options?? People presently using?

 

[DoubleV]

The Thornton will fit in a G-Body just as the originals would. I think the Thornton ones have 2.5" outlets over the smaller ones on the originals so they should work better.

 

[Bar50]

I used the stock 455 driver's side manifold and the passenger's side from a Toronado. Just my two cents, mine looks a lot like the W/Z manifolds I had on my '70 442. Scour a salvage or two, I would before I gave BIG money for either.

Mine are not 2.5 outlet thou.


I have been a Buick guy for a long time, Olds & Pontiac by default as well, in that, I have bought every set of Olds & Pontiac headers I ever came across. The '82 Cutlass I swapped a 455 into, has the manifolds, I now have several sets of Olds headers, (seven total sets) there are only two basic makes (in my collection) long and short for ease in description, I know there are other versions (as mine all seem to be small tubes).