since h&r wheel spacers are on back order i had to order some ebay wheel spacers. http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWN%3AIT but these spacers dont come with studs. these are 15mm spacers how long of studs will i need and where can i get them from. also how hard is the install on studs. do i just hammer out the old ones and place the new ones in.

thanks in advance guys