This handling mod will work for any car. Was initially tested on the Massacro Race car.

OpenIV Location to find Handling.meta file if you want to use the handling mod on Massacro Race
Grand Theft Auto V\update\x64\dlcpacks\mpchristmas2\dlc.rpf\common\data

Handling Line:

      <fMass value="1700.000000" />
      <fInitialDragCoeff value="8.000000" />
      <fPercentSubmerged value="85.000000" />
      <vecCentreOfMassOffset x="0.000000" y="-0.100000" z="0.000000" />
      <vecInertiaMultiplier x="1.200000" y="1.600000" z="1.900000" />
      <fDriveBiasFront value="0.000000" />
      <nInitialDriveGears value="6" />
      <fInitialDriveForce value="3.584000" />
      <fDriveInertia value="1.000000" />
      <fClutchChangeRateScaleUpShift value="3.000000" />
      <fClutchChangeRateScaleDownShift value="3.000000" />
      <fInitialDriveMaxFlatVel value="380.199997" />
      <fBrakeForce value="0.900000" />
      <fBrakeBiasFront value="0.450000" />
      <fHandBrakeForce value="0.800000" />
      <fSteeringLock value="58.000000" />
      <fTractionCurveMax value="0.230000" />
      <fTractionCurveMin value="1.050000" />
      <fTractionCurveLateral value="25.500000" />
      <fTractionSpringDeltaMax value="0.050000" />
      <fLowSpeedTractionLossMult value="0.800000" />
      <fCamberStiffnesss value="0.000000" />
      <fTractionBiasFront value="0.484000" />
      <fTractionLossMult value="1.000000" />
      <fSuspensionForce value="2.450000" />
      <fSuspensionCompDamp value="1.400000" />
      <fSuspensionReboundDamp value="3.100000" />
      <fSuspensionUpperLimit value="0.100000" />
      <fSuspensionLowerLimit value="-0.080000" />
      <fSuspensionRaise value="0.000000" />
      <fSuspensionBiasFront value="0.480000" />
      <fAntiRollBarForce value="0.700000" />
      <fAntiRollBarBiasFront value="0.650000" />
      <fRollCentreHeightFront value="0.230000" />
      <fRollCentreHeightRear value="0.180000" />
