drag_civic_si

I have three broken studs on the right front and I am too cheap to pay for the labor to have them changed and want to do it my self. I have already purchased the studs and I pulled the rotor off but the hub won't detach and I was wondering why this is happening. Is there a special hub removal tool that I must have to complete this and if so is there anyone that has some detailed instructions on how to perform this repair. Thanks.