I'm planning to change my LH or driver side RX330 valve cover gasket, there's a plastic encasement on side or top of it
that is holding a wiring for spark plug which has two (2) bolt holding it and I don't know what tools to use to loosen this two bolts.
Bolt side is rounded and a small head top look like torx, appreciate any suggestion or help I can get. Thanks

 

you need an external torx socket. I cant remember the size but i think its an E6. A small set is available at harbor freight. Or you can just grab the top of the stud with a vice grips and spin out the whole stud.

 

Thanks a lot, I do appreciate it.