manifold ideas

Anyone made a exhaust manifold from scratch, ive done a search and saxo/polo 6n & rover k series has been mentioned, whats the difference with these...different port size ? different hole positions ? different port shape/spacing on the flange ?

Whats involed in making them fit correctly ?
 
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vw egr flanges and a pipe bender maybe ?
 
They do a nice manifold but hell thats way over priced, i can buy a rb25 top mount mani for less than that and thats way more complicated harder to make!

fury autoworx do a reasonable priced one
 
Did a bit of digging but couldnt find anything like feedback on a forum, ive got my eye on the mani with a dummy cat, are they no good welded badly ?
 
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