I have 98 yukon 5.7. I just had a diagnostic ran on it and was told that I need to replace the catalytic converter. It is a y shaped double converter. They sell a direct and a universal fit. What I want to know is with a direct fit does it just bolt on without any mods? Will I need anything else to ad when replacing? I figure if I can do it myself I can save a
Good bit of money verses paying for it.