so for a while now I've been wondering why my 1998 Integra ls isn't making as much power as it should. it will accelerate as it should but when you try to step on the gas the engine just shakes and sounds like its under a lot of pressure. did some researching and found out a clogged/broken catalytic converter can cause this.(also figured out that the dude who sold it to me probably ruined the piston rings or valve stem seals because it burns hella oil.) that would also explain the rattling noise in my exhaust from 3k-3.5k rpms. broken cat! obviously buying a new one would be ideal but what about gutting it? the exhaust would definitely get more airflow than im having now. any thoughts?