Just bought a set of Iridium grade 7 spark plugs for my 97 WRX Sti Type R from scooby world. Anyone know if these are NGK BKR7EIX or NGK PFR7B? Are these the right plug for my motor? As far as I'm aware the engine is standard with just a cat back system, filter and a boost controller. Also what gap should I set these at before fitting?

 

What does it say on the plug - or am I missing something here?
The first ones are iridiums and the second are platinum tipped. They are pretty well the right choice for the STi
JohnD