Spark plug NGK or AC DELCO

Another BKR7E user. Never had any problems with them.

I too run these on my stage 2 1.8t gapped at .028 and replace them every 10K miles. So far so good.

I've run BKR7Es for years with zero issues. I've tried other plugs and I always go back.

Plus they are nice BKR7EIX's (NGK Iridium 1-Step Colder than OEM) and barely have 5000-6000 miles on them, and are gapped to the recommended 0.28 of the APR tune, so there shouldnt be issues, right? As it turns out, my engine cares, A LOT.

After I was done installing the new plugs and coils, I started the car and immediately noticed how much smoother the idle was. I then went for a drive and was really impressed by how much smoother and consistent the power delivery was overall, not to mention the graciously absent misfire under load.

Did this last night without any issues. The coils were in there tight but a warm engine and some tough talking got them out. I went with NGK Iridiums and the car seems to drive smoother - other than that, all is good at 60K.

Ngk Platinum all day

same everything but using a C2 Motorsport Stage 1+ tune. rippin!!

So I went to my uncle who is a part owner of a auto parts supply company and he ordered me 5 Beck Arnley 178-8445 Direct Ignition Coils for my car and 5 ACDelco 41-806 Professional Platinum Spark plugs.

Just reporting in after some usage... the NGK 4644 aka BKR7E seems to foul easier than the Autolite plugs I ran previously.