Hey guys - quick question - what's involved in replacing the passenger side exhaust manifold on a 98 a4 avant qm 2.8? I just had new flex pipes welded in, and still had a leak. Was told my manifold is cracked. I do all of my own repairs, and have never heard of or experienced a cracked manifold on our cars. However, there is def a much stronger exhaust smell coming from right over top of the right manifold. Please tell me I can replace without removing the head. Thanks, ian