my tuner linked me to these ngk R5671A-7 on xenocron. it's a silly question i suppose, but anyone know the gap for these at 8psi?

 

You could run a .033-.028 and be fine, depending on the turbo. I would use 6's if you expect under 210whp though. I've used stock plugs at stock gaps before on an otherwise good setup up to 7psi...dyno graph was smooth as silk

 

thanks, it's going to be on a garret t3 super 60. .42 comp/.63 turbine a/r's.