so I was driving on the highway last night and i started to hear a slight whistle whenever the throttle was engaged. I figured it was an exhaust leak someplace. I popped the hood and looked at the passenger side exhaust manifold to find a small chunk missing from around one of the studs. The car is going into the shop on monday anyway for other warranty repairs, i'm just wondering how hard it is to install and how long it takes to install a new exhaust manifold.?
