This is for a 6V-71 supercharger only that could be used as a spacer or be fitted for injectors or as a NOS plate but that is up to you to decide. It is made from 1" thick 6061 billet aluminum and has a machined finish that is pictured but could easily be polished or left as is. The last picture will show you the difference of a 6V-71 and a GMC 6-71 blower, they are not the same and the plates are not interchangeable. If you need one for a regular GMC blower check out our store.