Morning everyone. Think my 05 STI UK wants some fresh sparkplugs. Running 330bhp so pretty standard. Anyone got some good plug numbers and brands for me please.

 

Get the NGK7s

 

NGK PFR 7B PLugs as above

 

is ur car a 2.5 ? if so you dont want the PFR7B as thats a 2ltr plug from memory,
http://cgi.ebay.co.uk/4-x-NGK-IRIDIU...#ht_2270wt_882

 

She is a 2lt. Thanks for the info guys

 

Standard plugs are PFR6B. My car is in a similar state - just a basic remap to 330 - and Scoobyclinic advised that if it runs OK on a 6 then there is no reason to go to a harder plug. I've done track days like this with no problems. Have a search on this forum as I recall reading threads where harder plugs have caused misfires on mildly tuned Scoobs.