Hi,

Anyone know if it is ok to use the shorter reach spark plugs (e.g. PFR7B) when the
stock plugs are the longer 26.5mm reach?

Basically I’ve damaged one of the plugs on my 2008 STI (don’t ask), so am needing
a new pack. Since the car is “stage 2” running 350bhp / 1.25bar I thought I might
as well go for a colder plug?

If not then I was thinking either NGK LFR7AIX or the Denso IKH22.

Any advice greatly appreciated..

Stu

 

Anyone recommend where to get NGK-LFR7AIX plugs from in the UK?

Cheers
Stu