Spark plug NGK or Autolite

I have now used those plugs of mine up to 35psi so far with no issues.

Same exact plugs I use they haven't given me any issues I have em gapped to .022 and no misfires at 31psi, the car made over 600whp with no problems with these plugs, and they cost about $3 a plug.

DCPR8E NGK copper. we use stock gap and change every 10k-15K miles. So far so good for me. 12psi fyi.

I still use stock gap on my DCPR9EIX on my turbo R with no missfires.

Running NGK DCPR9EIX gapped to .022" with no misfire issues.

The 9s are good. Considering I have run them anywhere from 15psi to 36psi of boost and they have performed flawlessly I would say that they work well.

I replaced the spark plugs earlier. The new spark plugs is NGK PFR6Q from Checkers. It is gap @ .032. The old spark plugs are the very cheap Autolite. The previous owner probably tried to save money, but it end up cause me a lot of trouble. The gap of Autolite plugs are more like .042. I drove it a couple blocks I installed the NGK, and it felt better.

Stock on mine was .032, but my buddy's GLI was gapped from the factory at .029. I gapped my NGK iridiums at .028. I broke two plugs in the process...gapping iridiums with a normal gapping tool doesn't work!!

I took a peak at mine the other week and the gap was HUGE so gapped them down to .035 and now cold starts are ROUGH. The pugs in there suck, anyway - old autlites.

I just did mine not too long ago and bought the NGK's @ Advanced but they claimed that it had to be gapped @ 0.032 but when I took the old ones out, the bosch we gapped @ 0.030. I put the new ones in and you can feel it not running as smooth but I've been too lazy to find some gapped @ 0.030.