6 or 7 grade NGK for 277bhp MY99 UK Turbo?
 

As above, PFR6B or 7B for a MY99 Turbo run full de-cat and Tek 2 map, 277bhp, 266lb/ft??

i would say 7s as its modded.

You can't go wrong with 7's

Cheapest supplier??

get on ebay i got mine for £22 quid think they are £42 at subaru dealers???

get on ebay i got mine for £22 quid think they are £42 at subaru dealers???

would go for the 7b plugs i am supprised the mapper never suggested fitting these before the remap, it is reccommended to fit the 7b plugs before the mapping as the different heat range will effect the mapping ever so slightly