yeah we run the NGK part number 5238 i believe....you get them from advance, napa, etc.. those are not expensive <$20.... cars that i know of are making 500whp-600whp-700whp-800whp- and close to 900whp with them...... very cheap....but works.

best thing to do is: weight reduction, run open header, nitrous kit, slicks, seat time.
but it is really up to you to experiment. we're only giving suggestions...its up to you