not sure about the cam?

When i bout my car from my cousin after he drove the sh** out of it my dad and i did the trany,interior/exterior and paint we started to find out about all these after market parts it has and some of them we have the receipts for some of them

But we have been told by lots of people that know there cars and they say that my car idles and sounds like it has a cam of some sort. and i was just wondering if any of you guys know what kind i have.

BTW: it is obvious that it is a mild one.

thanks