Spark Plugs

[SilverBullet]

Which spark plugs do you use? Especially in hi-po engines.
Different head range affects engine performance?
Thanks.

[Turbonutta]

i use an nkg bps 7 its a heat range or two higher than stock as mine is a turbo aircooled

[SilverBullet]

Thanks for the reply, as my friend"s 2165 had problems when used stock plugs, he changed to ngk 7, no problems. Its does affect does it!