I originally purchased this manifold from the Fiero Factory for my 2.8L V6 Fiero, but before I had the chance to install it, I upgraded to a 4.9L engine. Since then, the manifold has been stored and unused. I'm now offering it for sale.
I want to be fair with the pricing, so feel free to share your thoughts on a reasonable price. I'll calculate shipping costs based on weight and your location.
I'm looking for a crack-free exhaust manifold for my v6. It's the one nearest the firewall
heres the picture of the one i have for reference nice and flat and was taken off a running fiero for a header swap. it is the trunk side not that it matters much
Trunk side fits the firewall side? Just making sure, cause my firewall side is that one with a crack, or was it just a reference pic?
ive flipped manifolds side to side many times. that ine doesn't have a crack and is the one for sale wince my other one has a broken bolt in it but is otherwise fine
ive flipped manifolds side to side many times. that ine doesn't have a crack and is the one for sale wince my other one has a broken bolt in it but is otherwise fine
You can't "flip" the manifolds. Each side is specific and do not interchange.
I do have a set of manifolds I removed the restrictions from for sale for $300 + shipping. But I won't separate them. Can get pics if anyone is interested, no cracks or welds.
yup. havent been too bothered since it was a spare and ironically i have more problems with my cylinder heads than my exhaust manifolds so its been on the shelf as a set
yup. havent been too bothered since it was a spare and ironically i have more problems with my cylinder heads than my exhaust manifolds so its been on the shelf as a set
I still do not understand. The manifold bolts to the engine.
Yep, that's certainly the way it is on 100% of Fieros with factory 2.8 installations.
either im extremely lucky with choosing ones that go on the right side or if you have ones with elongated holes from a previous owner doing exhaust gaskets from the top then they are not. the 88 i had was using my 87 GT's trunk side manifold against the firewall and all i did was use all bolts instead of studs since i had broken the studs anyways so as far as i know they bolt up just fine patrick. maybe im wrong but i havent have any issues with them leaking on the y-pipe other than having bent y-pipes from the connections being over tightened over the years and they seal fine against the head in my experience using the fel pro gaskets. again i might be wrong or maybe the 30 fieros ive done exhausts on by throwing the manifolds in a pile and using random manifolds from a mixed bucket of ones i grabbed off of parts cars have all been somehow the exact ones i needed by shear luck since i dont seperate them other than the ones in my garage which was a coincidence since the one with a broken bolt i know for a fact is a firewall side off of a 86
either im extremely lucky with choosing ones that go on the right side or... again i might be wrong or maybe the 30 fieros ive done exhausts on by throwing the manifolds in a pile and using random manifolds from a mixed bucket of ones i grabbed off of parts cars have all been somehow the exact ones i needed by shear luck...
the 88 i had was using my 87 GT's trunk side manifold against the firewall...
Not possible.
quote
Originally posted by cartercarbaficionado:
i guess the 88 had 2 of the wrong manifolds installed and i never noticed.
What does that even mean?
You still appear not to get it. Due to the exhaust port spacing, the only way that Fiero exhaust manifolds could be mounted on the "wrong" side is if the manifolds exited towards the water pump end of the engine.
You still appear not to get it. Due to the exhaust port spacing, the only way that Fiero exhaust manifolds could be mounted on the "wrong" side is if the manifolds exited towards the water pump end of the engine.
I highly suspect you would've noticed that.
i probably dont get it because i litterally just did it. on most fieros you are correct, i seem to be cursed with weird stuff that isnt standard or even correct. i dont think any of my 2.8s are with the right heads since i can take a trunk side flip it so its upside-down and bolt it to the firewall side with no issues as i just did it on my gt and have done it to the 88 after it cracked the firewall side. no clue why both of mine are like that and honestly it figures I have the odd one out. this would explain why the fiero store y pipe and any stock y pipe didnt fit quite right. i only noticed the difference looking at a set of sprint headers today and went "those wont fit....wait a minute" since they were bolted to a 2.8
[This message has been edited by cartercarbaficionado (edited 06-05-2025).]
On all Fieros with a factory 2.8 installation, I am correct.
quote
Originally posted by cartercarbaficionado:
i dont think any of my 2.8s are with the right heads since i can take a trunk side flip it so its upside-down and bolt it to the firewall side with no issues as i just did it on my gt and have done it to the 88 after it cracked the firewall side.
Let's see a photo of one of these "wrong" heads, preferably mounted on a fully assembled Fiero 2.8 engine.
i can take a trunk side flip it so its upside-down and bolt it to the firewall side with no issues as i just did it on my gt and have done it to the 88 after it cracked the firewall side.
[This message has been edited by Patrick (edited 06-07-2025).]
guess your right. my gt (hasnt ran yet in my ownership) apparently just had 2 exhaust ports open? so they just had the bolts and nuts there kinda just holding it to the head fkr some reason. the mysteries of that car amaze me. maybe they ended up scrapping it because they couldn't get the right manifold or something idk but i have a set on it now. as for the 88 i guess ive been getting stupid lucky the 5 times ive had to take the exhaust apart and throw it in a pile because it melted a manifold...thats a separate issue entirely
No guesswork required. Only in an alternate reality would exhaust manifolds be able to swap sides (and exit in the correct orientation) on a Fiero 2.8 engine.
[This message has been edited by Patrick (edited 06-08-2025).]
Nope. It will bolt up, but the the outlet will be pointed at the battery. If you flipped it around, the center port wouldn't line up, and the outlet would be pointed downward. If they were interchangeable, the firewall side (which is the one that gets rained on, and cracks) wouldn't be in such high demand.
Edit - I see I'm late to the party, as usual. But my comment still stands.
[This message has been edited by Raydar (edited 06-13-2025).]
But my comment still stands.
