just did them on my 04 gtp, i got lower intake gaskets, supercharger gaskets, valve cover gaskets/grommets, coolant elbows and a throttle body gasket, rtv sealant, coolant, would be a good time to replace filters, plugs, wires and to do an oil change! i ordered injector o rings but they came in late plus cost me $36 with my gm discount so i decided to return them

im newer here so i might have missed something, but someone else will chime in