Would one of you awesome guys like to give me some quick info on basically im getin my decat up pipe fitted this weekend im goin to take it to a mechanic, ive read various posts and am i all covered in thinking all i need to do is get a bolt to fit the hole :s and a resistor and leave the rest in the mechanics hands? Anything else i should know or help prep him for?

Bare with me im still learning along the way.