Spark Plugs ????

[TurboGN871]

Just need some opinions I want to see what plugs have been performing the best and what everyone is using.
I have an 87 GN with a stock turbo (for now!) and I want the best plug for it.

 

[Jerryl]

Just need some opinions I want to see what plugs have been performing the best and what everyone is using.
I have an 87 GN with a stock turbo (for now!) and I want the best plug for it.

Try this site:
http://www.gnttype.org/maint/basics.html

Or try search

 

[SloGN]

NGK iriduim

i use the NGK iriduim plugs the car runs smoother @ idle and has more response on the low end.

 

[1BUICKGN]

Plugs

I use AC DELCO R43ts in my we4 and it has always seem to run good with them.

 

[Grumpy]

AC's all the way with mine ... BUT they are only mid 11 cars