I'm changing my spark plugs on my b20 turbo.(256whp 198ft trq) I have bcpr7e's in there right now. I want to know the difference between bcpr7e's and bkr7e's and what should the gap be? Tia

 

BKR7E's come with a smaller gap from factory. .030 i believe. the BCPs come with .040 or .044 (hard to remember offf the top of my head).

The BKR7E is ISO projected, and is less likely to be a potential hot spot. the BCP's project deeper into the combustion chamber.

the ideal gap is the largest gap you can run without blowing out spark.