AO Platinum Member
Join Date: Feb 2002
Location: The land that Time forgot
The plug has to fit and it has to have the right heat rating.
Fit is not just about the thread diameter... some plugs have a projecting electrode which is asking for trouble if you fit one of those into an engine that wants a flush electrode, for example.
But yes.. all the letters and numbers in the plug "name" refer to its spec' and some are less critical than others. The Alfa standard NGK plugs are multi electrode/blade type.. They don't *need* to be.
As above though, if you spend £60-£80 on a set of eight, they are fit and forget... (though having these instead of regular plugs, which would still cost you best part of £40 after all) does remind you that there is an engine in the front that will appreciate an occasional bit of TLC (check the oil, top it up, change the cam-belt and tensioner at 36k and so on.)
No bullets for Chaingun..