I asked this question not so long ago, but can`t find the thread.
My Sti2 is in for a service at the end of April, i want to fit NGK plugs, i asked if PFR6B were ok, and was told that if my car had been modded i needed PFR7B. I phoned the garage today and to cut a long story short was told that PFR6B would be ok.
The only mods i have is a Magnex decat centre pipe and a Scoobysport back box, so do i need 6`s or 7`s

 

6's !!!! for a more modded car then 7's & more modded than that 8's......

 

My owners handbook states which type of NGK plug it likes, its snowing though and i dont want to get wet

Tony

 

Looks like 6s then

Cheers Tony, no handbook with mine, if there was it would be all Greek to me, or would it be Japanese

 

Absolutley Nutty

 

If your at the next LADS meet ill show you what my handbook says, its a bit more modern though in ways of design, you may have seen my car there at the last meet, the white spec c

Tony

 

Tony, cant say just yet if i will be at the next LADS meet, depends on work, would like to be there.
Are you on the Dales run on sunday ?

Saw you car at the last meet gave you a wave as you left, as you say "its a bit more modern though in ways of design" that must be a little white lie on your part you must let me sit in it next time, maybe start her up

See you soon, Kev

 

You should fit 7's or 8's the 6's are very prone to pre-ignition ... read det. The handbook doesn't account for a Jap spec car in UK using UK fuel.

bob

 

My owners handbook states that the JDM wrx runs PFR6G and the STi runs PFR7G.
Hope that helps

Tony

 

Why not try NGK Iridium,spec.ordered mine from Halfords.Took a couple of days ,cars great on them MY95 WRX,Ive a straight through Scorpion,Hks Super.induction.
They cost £10.47 ea.If you want the part no.its BKR6EIX.
Carl.

 

Are you sure they are the correct ones Carl?
On the NGK website it recommends the BKR6E for non-turbo cars

Tony

 

http://www.ngk.co.uk

 

Just emailed NGK,thanks for that Tony,hopefully they will confirm soon if right or not.
When i ordered from Halfords they phoned NGK direct to confirm though,in front of me..We'll see anyway!
Carl.

 

Still slightly confused which NGK ones do i order

 

7's, do not use 6's in an STI.
have a look in scoobyshop to order some at around £35

 

http://www.spark-plugs.co.uk/cars/subaru.htm

You might want to check out this link. I too purchased a set of iridium NGK sparkies for £28.00 (all in) and the code for these is - BKR6EIX. On the site listed above they show this code for Turbos and BKR6EIX-11 for Non Turbo. I assumed therefore that these Iridium plugs would be fine.....I would however be very interested in knowing what NGK reply with ?

and this from ScoobynetShop
http://shop.scoobynet.co.uk/Product.asp?ProductID=803

Cheers

 

You need PFR7B as already stated by those that know

 

So is the Platinum plug a better bet than the iridium then ?? I went for the Iridiums cos I thought they were more efficient better for the engine etc etc Hmmmm got me thinking now

 

Just ordered PFR7Bs, saw them in scoobyshop, £35 with p+p