We don't have a Napa store here but I'll go somewhere equivalent and see what they have. If I can buy a cheap enough set of bits I will, particularly now I know the size of the ones of particular importance .

Otherwise I'll just buy the T20 safety torx bit for the tps removal kit.

Thanks for your responses.

Staintune Pipes, K&N Pods, 45 pilots, TBS needles and 145 mains.