well just bought this car for 3k the other night and has 95k miles and had the checked engine light on and he said its always the 02 sensor that goes bad every 20k miles but turns out to be by the 02 sensor the upper top one there is a crack on the manifold. I dislike this manifold b/c it has the cat convereter along with it(all in one). Can i find this cheap and saev money by installing it myself? My crx is not liek this and i taken the manifold out myself plenty of times. They are qouting me $695 for labor and part. I bet half of that is labor. need help where to fidn this or can i go by just the manifold from other models and run the cat converter further down basically a custom job. and the a/c bearing are bad they say how hard is that to DYI?>