Well, it was time to change my plugs and every where I went didn't have the BRK7E's 1 step colder plug. I was able to cross reference to a ACDelco FR1LS. This plug seems to work great just as the NGK did, both gapped at .40. I did a search and did not find anything about these plugs, so here you guys go that are in my particular situation with not being able to find the NGK's. If anyone has had a bad experience with these plugs please let me know. If These things go bad or remain good I will update once I get a few more miles on them and able to pull them out to check. Hope this helps some people out.

 

My advice is to stick with stock Iridium NGK GM plug...not one heat range, for stage 2GM programming. The GM folks did a LOT of work to come up with the right plug...my 2 cents

 

I am running a smaller pulley and a intake over the stage 2 so a 1 step colder plug is what I need. As far as the FR1LS, it is made the same as the BKR7E from what I was told. Only time will tell. And yes you are correct for stage 2 and below applications.

 

i was thinking about going those plugs as well how were they treating u????

 

The stock cobalt ss plug is a NGK R PFR6T-10G which is a platinum plug.

 

To me they were just as good as the NGk's, but when the NGK's were available I went with them. I just posted this to let people know there was another option, if they could never find the NGK's like me. I always had to order them.

 

well im wondering if i need one step colder plugs i have a cai exhaust stg2 psyko tooned and a 2.85 pully

 

3922 autolite coppper...one step colder than stock

 

yea the 3922 were recomended to me aswell but wut is the difference between those and the ngk and the acd???

 

subscribed.

 

Old thread. What is a stage 2 plug by ngk not going iridium

 

like 1 heat range colder?

 

2 heat range colder