Here's a link to other cars that use the BPR7ES plugs. It could be simplify things for the counter person.
http://www.dsmtuners.com/forums/newbie-forum/164374-do-you-need-find-ngk-bpr7es-local-parts-store.html#post1365009
Try to imagine an egg between your right foot and the gas pedal. Press lightly as not to break the egg. Anticipate stops and release the gas pedal early. Boost is your enemy!
Actually they are in a 9006 1GB housing. I didn't have to trim anything. Bolted right in. I just had to make sure that they were level before I sealed the housings back up in the oven (don't tell the wife. Hope she doesn't read these forums).
I made this one. Switches & LED holders are from an electronics supply store (All Electronics | Electronic and Electro-Mechanical Parts and Supplies at Discount Prices). It doesn't really stand out, but they are within easy reach.
Oh snap! It's after 12:30. Looks like I missed the boat. When I worked the graveyard shift, I would have a beer (or four) when I got home at 7am. It was weird at first, but later it seemed justified.