Hi going from the picture is this exhaust manifold stock ?

 

No

 

Interesting. What are the benefits of these manifold? Better spool up ?

I bought the car about 3-4 weeks ago and I'm trying to find out what's been done to the car . It's got what seems a puk clutch.

 

Up to 400hp i dont think they do much, but nice to have anyway.
There's a few stickies on here about buying your first evo.
Main thing is you get the fluids done and maybe the tune checked. Look for rust also
Read the mod threads and you'll get to know what are the common mods.
Dont start working on it until you know what you're doing. I've broken clips that are hard to find.
Try and find out who worked on it and ask questions