This is the manifold I removed from my mk3 cooper s project. Its obviously been made to fit. Does anyone know what the original manifold should look like?
Hope you can help?
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UPR 65 1963 MK1 Super Deluxe
FTX 217K 1971 MK3 Cooper S
Dean the engine photo above by Lokie shows an original exhaust manifold, they weren't tubular as they are now. They're only available used and you'll find it tough to source a decent one. I'd personally just use a modern 3 branch equivalent from Maniflow or such unless you're going for 100% originality (yawn...). The butchered cast one on your engine was quite a common way of replacing an exhaust manifold on the cheap back in the day, a typical skinflint would cut the inlet off the top of the casting to enable it to be used with a seperate inlet (as you have on the 'S') and basically strangle the engine in the process .
If you want 100% originality you'd be looking for an original for a while, bearing in mind it was a common performance tweak to fit a Special Tuning one (ie Downton) (ie pretty much the same as a new Maniflow!)
Oh dear I am a skinflint lol, cut a few of those back in the day, though I did eventually buy a decent three branch and a rc40 lol.
Another cheapo job was to use the two boxes of a gt as they had a wider bore on the tail pipe and in between the boxs. But they had a narrow front section.
Answer remove the skinny front pipe and use a section from a maxi as it also had the crank in it to get past the gear stick remote. And it was the size of bore as the tail pipe, that might have been only me that carried out that cheap mod lol
Scrapyard exhaust weren't they the best, made my first on from a ford granada exhaust. Was the closest size I could find to what vizard recommended in the white book and had a chrome tail pipe