Looking at your combo, you probably don't need either. Many people are quick to jump to larger injectors, but most who know will say the 19# units will support 300 HP or so. Unless you are planning to add a blower or something soon, I would just stick with your stock units for now.
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2006 Mustang GT
1990 LX
GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved)
1998 Contour SVT
Rice Haters Club Member #244
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