I'm in the middle of getting everything I need to replace my clogged/disintegrated pre-cats and am having trouble finding the angle of pipe I need for the replacement. I figured I'd ask on here if anyone knew the angle of replacement pipe needed to go in place of the pre-cats. I'm thinking maybe 60 degrees, or at least somewhere close to that. I'm planning on replacing the pre-cats with the pipe and putting new cats in the rear.

 

I just had my precats removed by a local muffler shop. He only charged me $40. However, you won't find anyone in CA who will do that for you. You also won't be able to pass smog if you do it.