I had a C6Z with LT's, intake, exhaust and tune and a 04 viper with intake, tune, catless corsa race, and TB and the viper would pull on the C6Z by a little ever time. So in my experience a lightly mooded gen 3 will out perform a lightly modded C6Z. But I really dont see how a 600 hp/560tq viper is a close match to a 505hp/470tq C6Z with vette being 300lbs lighter. I can tell my gen 4 is faster then my modded 04 was so no way a stock C6Z is gonna hang. Just my .02 and if I can find a C6Z locally to run Id be glad to report my findings.