Celica Forums General Discussion Exterior Installin new parts

Have a question, i had a friend of mine tell me that when you install parts in ur engine, you have to give it a few drives, before you can add to it, you know that you cant put on your headers, exhaust, intake, pulley, etc...all at one time abd then start driving, is this true, someone please clarify it for me!!!

its not true, it makes no difference if you drive it around between putting parts on or not

thanks...