The Vapid Flash GT from the Southern San Andreas Super Sport Series update.
I originally tested this with Sentinel handling but Sultan RS handling with tweaked center of mass would probably fit it better

Use https://gtaforums.com/topic/955449-iv-zolikapatch/ to unlock the 4 livery limit

Handling:
FLASHGT 1600.0 6.5 85 0.0 0.1 -0.26 0.3 5 0.26 1.0 155.0 0.25 0.70 0.7 35.0 1.50 1.20 14.0 0.15 0.48 2.0 1.3 1.3 0.09 -0.13 0.02 0.5 0.8 1.0 0.8 1.5 0.0 25000 440000 0 0