I've got the 2.5 engine. I have inspection coming up, and I'm almost 100% sure I'll fail on emissions and have to get a new cat. I can hear it rattling when I drive and on start up, and it barely passed 2 years ago. I've seen people talk about high flow stuff to help this engine some with power. Are any worth it? Any recommendations? Also, the exhaust will need replacing too, any recommendations there? Thanks.