i have simple questions that alot of you should be able to answer so please give me the most input you all can I need all the help I can get..... that i can't get out of performance dealers.....

1. I am simply pulling my EGR plug and butterfly plug and leaving it off what is the harm short term/long term. Exhaust temps, etc.

2. putting a straight pipe in the place of my CAT and DPF. What is the harm what will it help so on so forth.

Like i said i need all the input i can get and any other information concerning the EGR, DPF, Exhaust, Etc.

Thanks guys.