As Neil says above.
Stick to the Sirio or Orion plugs wont go wrong at all.
I used to run Sirio engine for about 4yrs loved them to bits.
Danny did you get two buttons with the engine cause most Sirio engines used to be supplied with two button heads, the one usually fitted in the engine is none turbo. he one in the packaging is the turbo button head.
It may have changed now but thats what I found eveytime I had engine from Sirio.
Neil may know more
