Yea, the platins are great, but hard to find. Really I would only run colder plugs, if I was heading to the track, or always drive the car long enough to warm it up. Colder plugs can be easy to foul & throw a misfire CEL.

 

What are the stock plugs?

 

I actually switched to the old bosh side fire. the gap is super close for stock and you turbo guys should really like that. Also I think they came in the URS4 and from what I have read they are the only plugs those guys can run when they strap on bigger turbos

 

ngk plat. here

 

stock for me, never had any problems with them yet.

 

whats the part number for the old bosch

 

Highly recommend switching to some Bosche Copper's. No misfires!

 

DensoIK20 Iridium. Make sure you check the gap because mine came at .038 out of the package.

 

Sorry to bring a thread back from the dead, but what is the gap for a chipped S4? .028???

Josh

 

pretty sure it is