No, they would still be 19# injectors, its to replace the poppet style when they start to have problems.
If it runs perfect, I wouldn't do it.
I was just wondering if this upgrade is worth doing. My tahoe only has 73,000 miles on it and seems to run perfect. Will there be any significant gain of I do this upgrade.
well i was on the winjammer website and they list them as a recommended upgrade
They will make it run better but only if the ones you already have start failing.
1999 GMC Suburban 2500 7.4 Liter 4L80E trans and factory 4.10 rear
If you feel it runs "perfect" I wouldn't bother. Very little difference when I did mine. A far more important upgrade is the intake manifold gasket. Do you know if yours has been done? Do you use any coolant?