I have searched but had trouble finding a major discussion on a brand and model of spark plug desired for a 13b. What do you think I should run?
Engine Mods listed below.

ENGINE
Full Japtrix rebuild and street port w/ 1500 miles
Xssessive LIM port matched
Pettit lower pulley
Greddy water pump & alt pulleys
Block off plate kit
Solid aluminum motor mounts
SS manifold
SS 4" dp
Custom Midpipe
Greddy PE catback
Custom turbo: T63 w/HKS T67 comp wheel, .84 a/r exhaust w/3" v-band
Twin oil coolers with -10AN lines and fittings
Greddy 3-Row FMIC
Koyo Radiator
7 Blade JDM fans
TiAL BOV
TiAL 44mm Wastegate

FUEL & ENGINE MANAGMENT
Walbro intank pump
Speedmachine Surge tank
Aeromotive A1000 pump
Aeromotive 100micron filter
Aeromotive 10micron filter
-10AN fuel line and fittings to a "Y"
-8AN fuel line and fittings to fuel rails.
KGParts fuel rails and injector sleeves
1680cc injectors x 4
Aeromotive FPR
-8AN return
MicroTech LT-10s
Hand held programer
MicroTech ignition amp
Bosch coils x 4
Apexi AVC-R boost contoller

Thanks for the help!

 

also.... the area around the spark plug and the housing is so small that you cant fit a regular spark plug socket in. Should i grind down my craftsmen to fit or is there a spark plug socket i could buy that wouldnt require modification?

 

Where did you get the 4" downpipe? Is it custom?

 

I would run at least 10s in the leading, 9s in the trailing. Good 10 plugs are the NGK BR10EIX. You will need to grind down a socket or buy one that is ground down already (Racing Beat sells one). You can just use OEM 9s in the trailing.

That will be a good starting point.

 

sorry, i can't really help you on this one... you probably know more than i do, but i want to congratulate you on a job well done on your car...

 

thanks guys! as far as the downpipe goes.... its a 3 inch flange that transitions to a 4 inch pipe. its sort of useless since it goes back down to 3" and into a 3" midpipe then back to a 4" greddy pe catback.