03' Mustang Cobra spark plug feed back

Owner: Ratt Fink
Car: 2003 Ford Mustang Cobra

I have used iridium plugs, and stepped up to the Brisk Silver Racing plugs because I run about 24 PSI boost on my car, and add C16 racing gas. I NEED the spark plugs to work properly, and the BRISK Silver Racing G14YS spark plug has done the trick. The car was running 10.0x to 10.1x quarter mile times, and with the switch to the Silver racing spark plugs, the car has been running 9.8x to 9.9X times at 138-139 mph !!