Ok time to replace my plugs. Currently have NGK-R in there. The obvious thing to do would be to just replace with same ones but maybe someone has a better option. Reason I ask is did some reading and now I'm a little confused.
Here is what I have...Streetport, dual MSD ignition boxes, Demon 850cfm, full RB exhaust, AC delete, etc all that good stuff. Where I got confused is between the MSD and my distributer and "leading vs trailing" in regards to plugs.
Any ideas what would work best?
Thanks

 

Ok I was wrong. NGK in front housing and Br9eq or something like that in back. Should be NGK-R as the leads(bottom two) and other as trail(top two) right?

 

Leading..LOWER..(L)
Trailing..TOP..(T)..easy as pie to remember that way.
In your case use NGK's..(would be nice to state your car series next time you inquire)

Plugs would be NGK BUR7EQ (leading plugs)
and BUR9EQ in the trailings.
The Platinum plugs are a touch more expensive and the part number just has a P on the end of it.
Some say they are worth it but it's honestly a preference and a debatable subject.

 

Misterstyx69, Thank you and yes the series would have helped. GSL-SE. My apologies. Haven't been able to find the Bre9's. Supposedly NGK has discontinued them so will be looking for the replacement. So that said I'm going with the Bre8's all around for now.

 

I sent you a link.
Good luck.