Spark plug NGK or AC DELCO

That being said I ran Revo stage 1 and now APR stage 1 and in both cases I've had no issues running the NGK BKR7EIX plugs. I inspect them at a reasonable interval to make sure combustion looks good with them and it appears that they are doing just fine.

21K on my NGK's and no problem. Yes they were plug and play.

Never put those cheap ass Autolite plugs in... With that said, copper NGK plugs (brk6e) are great plugs...I was running the NGK -1 range cooler plugs (bkr7e) until the last GIAC update...and was pleasant pleased with the quality of the plugs...especially for $1.50 a piece!

within the past six months, off the top of my head, i had the following done at tyrolsport : timing belt water pump thermostat oil cooler and housing all new coolant hoses.. thats right.. i did it just cause.. i have the reciepts. valve cover gasket cam tensioner gasket ngk pfr6q's see where this is going?

i felt the same hesitation with my car. i did a scan and got some cylinder misfire faults so i changed my spark plugs to the NGK 1 heat range colder and i havent felt that hesitation since.

I used the NGK BRK6E V-power plugs, and from what I understand those are highly recommended, and I did switch the coilpacks from cyl 1&2. it's weird because I had many misfires before the CEL was thrown.

I know I use the cheap copper NGK B8ES plugs. Who cares if I have to replace them every oil change. For $1.79 who cares

I'm going to keep using NGK's though. The farm-supply store has a whole aisle of them and they're all $1.59 each . I've put them in vehicles where the OE's are Delco, Bosch, Champion, Motorcraft, or Denso and they've all run perfectly with the NGKs.

Mine popped up with the NGK's all i did is tighten the spark plug a little more and it stopped.

I tried those spark plugs and my car had a really bad idle. It shook like crazy then the CEL starting flashing. Some liquid was spitting out of the exhaust and some had some funky smell.