wanted the core plug size for the ones that are behind the exhaust manifold think there is 3 or 4 in a row any help much apreciated

 

I'm not sure as to the exact size but i put a new set in the engine i've just built, 'Burton Power' do a whole set for about a tenner iirc so cheap enough, best to phone them or have a look on their website as it may even tell you the sizes