I am going to purchase a RB Header but i was wondering do you have to buy the presilencer also. I want the header but dont have the cash for both right now. will the header mount up to the rest of my exhaust?

The header will not mount up to anything really. I believe it is just short of the catalytic convertor. Your best bet would be to have a pipe made up to go between the header and the Y-pipe. Or just wait until you can afford both.

Thanks for the info Jerry