My car originally came with a 2.73 gear....good for gas mileage, bad for acceleration. This has since been remedied.
Another reason is because 98 was the first year for the LS1, so it's not quite as strong as the 01/02s. And yes, that was before any mods.
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Shawn
2004 GSXR 750 - Yosh CF RS3 bolt-on, -1 front, DID, Watsen Design flush mounts, LP rear LEDs, Vortex frame sliders, Blue Puig DB, Pirelli Diablos
"Let us so live that when we come to die even the undertaker will be sorry." - Samuel Langhorne Clemens