I have a bad exhaust leak right before the cat where manifold goes 2-1, right at the welds its cracked and has a couple pin holes. I tried welding it up underneath the car but its obviously cracked again because the leak is back. I know the that the lower half of the manifold comes off but is it going to be a pain in the ass to take off? Anyone have a part number for the gaskets? Also the heat shield is rattling and rusty.. should I just toss it? The pipe isnt very rusty at all just in the one spot.