don't have an idea on which one to go with? ngk platinum (plfr6a-11) or ngk iridium (lfr6aix-11) also heard of a ngk platinum/iridium mix (lfr6aix-11p). i heard that platinum is better, but the same that iridium is better. i'm running about 9 psi of boost. any suggestion you my have.

 

^^^ Those are what I run in my car, they work great. I don't gap them since they come pre-gapped and I am using the HKS Twin Power Ignition system.

-George
GT Motorsports

 

stay away from platinum on an FI application.

go with the NGK iridiums or the coppers.

lfr6aix-11 for the iridiums or lfr6a-11 for the coppers. these are both gapped at .044" from NGK.

 

Those are great plugs and a very good deal!

 

ijust ought a set of the ngk lfr6a-11. these are the v-power copper plugs. I'm gonna see how I like them over the iridiums.