I'm considering buying these headers for my 85 Corvette, but now I'm not sure on fitment. The seller says they are made by Thorley.

I've never seen anything like them. The Ypipe has a 4-bolt flange and looks like it'd bolt right up to my 85 Corvette cat. The part that threw me off was the upward pointing air fitting. Corvette air fittings point forward. Also, the unusual #2 primary looks like it might stick out too far and interfere with my a/c lines and cat air tube.

Have you guys seen these? Is it possible he's mistaken and these are a Camaro header? I searched but all I found was a post referring to Thorley once making a Fbody long tube, no pics.

Sorry I don't have pics of the drivers side header. He's asking $550 for the whole setup, which I think is worthwhile, IF it fits.

 

I don't know, but the dent in the passenger-side rear primary looks horrible.

Personally, I'd get something that's tried and true, and without dents lol.

 

there are no good headers with dents in the primaries.

 

Looks like a dent that is there for fitment? None the less, they still look sweet.. But so do coated Hooker long tubes.

 

might have better luck asking on the corvetteforums....

 

The dent (deliberate for clearance) is insignificant.

 

I'm asking here because I suspect they might be Camaro headers. Do they look like they'd fit a Camaro? Do they have enough clearance for that #2 primary? Is the Y-pipe configured like that on a Camaro? Does it have a 4-bolt flange cat?

 

no, there is no way that setup would fit an f-body without serious fitmant issues.

 

Those are for a corvette....you can tell by the direct down motion of the primaries and the shape of the y pipe. Somewhere on those headers there will be a part #. Look for it and go to summit or jegs and see if the # comes up. Kind of look like TPIS headers.

 

not a sarcastic question but are you serious?

 

Yes.

 

I would assume it would hamper flow. though I admit I have seen something like that before but always assumed it was bad routing due to engineer not thinking as well. but then I donno

 

Five7Kid is right, the "dents" for clearance would have zero effect on power. I have seen thrashed, dented, patched, beat up headers used on the dyno make identical power to a fresh set out of the box. Thats why we use dynos, because what you THINK will work better, often times does not.

 

Why would you get headers with larger size primaries in the first place then?

FYI Five7Kid was being sarcastic as evident in his second post of this thread.

 

What are you talking about? as soon as I saw that "dent", which is a crimp on the tube, I knew it was for clearance.

 

That "DENT" is there so that you can install that Factory GM starter, you know the one that weighs like 30 lbs. It will NOT affect power to any large extent.

I don't know of anything else GM that uses that style of Y-Pipe. I am thinking they are for a C3 Vette.

 

This is a valid point. If you imagine these on your car, you would be cutting out your K member to get them to fit. They would need to have more of a "sweeping back" design to have a chance of fitting. I think I called the fitment dent first too

 

I wasn't questioning your knowledge of what the dent was there for. I replied to a post that said a dent in a primary will have zero effect on power.