[Replace installation]
Replace schafter2.yft, schafter2.ytd, schafter2 hi.yft in x64e.rpf/levels/gta5/vehicles.rpf

[Add-on installation]
Copy "acuratl" folder with dlc.rpf inside into update/x64/dlcpacks
Edit "dlclist.xml" inside update/update.rpf/common/data
Add the line <Item>dlcpacks:\acuratl\</Item>

[WORKING DIALS FOR REPLACE VERSION]
go to mods/update/update.rpf/common/data/levels/gta5/vehicles.meta
look for SCHAFTER2 and scroll down to dashboardType and change to VDT_SUPERGT

[PROPER FWD HANDLING]
go to mods/update/update.rpf/common/data/
look for SCHAFTER2 and replace the whole section with the following:

      <handlingName>SCHAFTER2</handlingName>
      <fMass value="1500.000000" />
      <fInitialDragCoeff value="8.000000" />
      <fPercentSubmerged value="85.000000" />
      <vecCentreOfMassOffset x="0.000000" y="0.200000" z="0.000000" />
      <vecInertiaMultiplier x="1.000000" y="1.600000" z="1.600000" />
      <fDriveBiasFront value="1.000000" />
      <nInitialDriveGears value="5" />
      <fInitialDriveForce value="0.200000" />
      <fDriveInertia value="1.000000" />
      <fClutchChangeRateScaleUpShift value="2.000000" />
      <fClutchChangeRateScaleDownShift value="2.000000" />
      <fInitialDriveMaxFlatVel value="145.000000" />
      <fBrakeForce value="0.900000" />
      <fBrakeBiasFront value="0.425000" />
      <fHandBrakeForce value="0.600000" />
      <fSteeringLock value="40.000000" />
      <fTractionCurveMax value="2.500000" />
      <fTractionCurveMin value="2.200000" />
      <fTractionCurveLateral value="22.500000" />
      <fTractionSpringDeltaMax value="0.150000" />
      <fLowSpeedTractionLossMult value="1.000000" />
      <fCamberStiffnesss value="0.000000" />
      <fTractionBiasFront value="0.480000" />
      <fTractionLossMult value="1.000000" />
      <fSuspensionForce value="2.200000" />
      <fSuspensionCompDamp value="1.200000" />
      <fSuspensionReboundDamp value="1.800000" />
      <fSuspensionUpperLimit value="0.090000" />
      <fSuspensionLowerLimit value="-0.140000" />
      <fSuspensionRaise value="0.000000" />
      <fSuspensionBiasFront value="0.530000" />
      <fAntiRollBarForce value="0.800000" />
      <fAntiRollBarBiasFront value="0.630000" />
      <fRollCentreHeightFront value="0.400000" />
      <fRollCentreHeightRear value="0.350000" />
      <fCollisionDamageMult value="0.700000" />
      <fWeaponDamageMult value="1.000000" />
      <fDeformationDamageMult value="1.300000" />
      <fEngineDamageMult value="2.200000" />
      <fPetrolTankVolume value="65.000000" />
      <fOilVolume value="5.000000" />
      <fSeatOffsetDistX value="0.000000" />
      <fSeatOffsetDistY value="0.000000" />
      <fSeatOffsetDistZ value="0.000000" />
      <nMonetaryValue value="35000" />
      <strModelFlags>440010</strModelFlags>
      <strHandlingFlags>0</strHandlingFlags>
      <strDamageFlags>0</strDamageFlags>
      <AIHandling>SPORTS_CAR</AIHandling>
      <SubHandlingData>
        <Item type="CCarHandlingData">
          <fBackEndPopUpCarImpulseMult value="0.100000" />
          <fBackEndPopUpBuildingImpulseMult value="0.030000" />
          <fBackEndPopUpMaxDeltaSpeed value="0.600000" />
        </Item>
        <Item type="NULL" />
        <Item type="NULL" />
      </SubHandlingData>