Plugs being gapped at .045 instead of .054 killing performance?

[xspeed02]

A while back I tuned up my car and the parts guy said either the gap was .045 or .054... Anyways, all of you said it was .054 but we put it at .045 since the gap of the plugs we pulled was .048... now, do you think this is possibly killing performance? And if so would it even be noticeable?

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Team Xspeed Leader/Co-Founder
1990 Black Mustang GT 5spd
Current Mods: 2 1/2 Offroad H-Pipe, Borla Cat-Back Exhaust, 91-93 5 Star Pony Wheels, K&N Filter, Free Mods, Pioneer Headunit, MB Quartz Speakers, Orion Xtreme 300 Amp, 2 JL Audio W0's, 130 Amp Alternator, 3.73's, Steeda Tri-Ax Shifter
Future Mods: Engine rebuild with Trickflow Heads, GT-40 Intake, Custom Ground Cam, and 14lb ATI Procharger!
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