Recently installed a dorman intake mani on my npi 2v and the car fired right up but it didn't sound to healthy it had a misfire and almost like some cylinders weren't getting any pressure? It's just lacking power and I'm assuming its because of the miss. She also puked some oil so I replaced the gasket underneath the oil filter(forgot what its called) and that solved that problem. The cats do sound clogged so I'm assuming that's what causing the miss? Plugs and wires are all good as well. Should I go ahead and but he cats? Any help would be very much appreciated! Im still learning so please feel free to correct me and point me in the right direction!