(Only do this if you have add-on vehicles)

If you want your owned add-on vehicles to have parachute, add this line on the FLAG section on each vehicles line (on vehicles.meta):

FLAG_HAS_PARACHUTE

The result will look like this:

    <Item>
      <modelName>r8v10</modelName>
      <txdName>r8v10</txdName>
      <handlingId>R8V10</handlingId>
      <gameName>R8V10</gameName>
      <vehicleMakeName>Audi R8 V10 2015</vehicleMakeName>
      <expressionDictName>null</expressionDictName>
      <expressionName>null</expressionName>
      <animConvRoofDictName>null</animConvRoofDictName>
      <animConvRoofName>null</animConvRoofName>
      <animConvRoofWindowsAffected />
      <ptfxAssetName>null</ptfxAssetName>
      <audioNameHash>ninef</audioNameHash>
      <layout>LAYOUT_LOW</layout>
      <coverBoundOffsets>R8V10_COVER_OFFSET_INFO</coverBoundOffsets>
      <explosionInfo>EXPLOSION_INFO_DEFAULT</explosionInfo>
      <scenarioLayout />
      <cameraName>DEFAULT_FOLLOW_VEHICLE_CAMERA</cameraName>
      <aimCameraName>DEFAULT_THIRD_PERSON_VEHICLE_AIM_CAMERA</aimCameraName>
      <bonnetCameraName>VEHICLE_BONNET_CAMERA_MID_NEAR</bonnetCameraName>
      <povCameraName>REDUCED_NEAR_CLIP_POV_CAMERA</povCameraName>
      <FirstPersonDriveByIKOffset x="0.000000" y="-0.055000" z="-0.050000" />
      <FirstPersonDriveByUnarmedIKOffset x="0.000000" y="-0.100000" z="0.000000" />
	  <FirstPersonProjectileDriveByIKOffset x="0.000000" y="0.000000" z="0.000000" />
	  <FirstPersonProjectileDriveByPassengerIKOffset x="0.000000" y="-0.045000" z="0.015000" />
	  <FirstPersonProjectileDriveByRearLeftIKOffset x="0.000000" y="0.000000" z="0.000000" />
	  <FirstPersonProjectileDriveByRearRightIKOffset x="0.000000" y="0.000000" z="0.000000" />
	  <FirstPersonDriveByLeftPassengerIKOffset x="0.000000" y="0.000000" z="0.000000" />
	  <FirstPersonDriveByRightPassengerIKOffset x="0.000000" y="-0.055000" z="-0.020000" />
	  <FirstPersonDriveByRightRearPassengerIKOffset x="0.000000" y="0.000000" z="0.000000" />
	  <FirstPersonDriveByLeftPassengerUnarmedIKOffset x="0.000000" y="0.000000" z="0.000000" />
	  <FirstPersonDriveByRightPassengerUnarmedIKOffset x="0.000000" y="-0.100000" z="0.000000" />
	  <FirstPersonMobilePhoneOffset x="0.130000" y="0.211000" z="0.580000" />
	  <FirstPersonPassengerMobilePhoneOffset x="0.136000" y="0.156000" z="0.463000" />      
      <PovCameraOffset x="0.000000" y="-0.200000" z="0.695000" />
      <PovCameraVerticalAdjustmentForRollCage value="0.000000" />
      <PovPassengerCameraOffset x="0.000000" y="0.000000" z="0.000000" />
      <PovRearPassengerCameraOffset x="0.000000" y="0.000000" z="0.000000" />
      <vfxInfoName>VFXVEHICLEINFO_CAR_GENERIC</vfxInfoName>
      <shouldUseCinematicViewMode value="true" />
      <shouldCameraTransitionOnClimbUpDown value="false" />
      <shouldCameraIgnoreExiting value="false" />
      <AllowPretendOccupants value="true" />
      <AllowJoyriding value="true" />
      <AllowSundayDriving value="true" />
      <AllowBodyColorMapping value="true" />
      <wheelScale value="0.268000" />
      <wheelScaleRear value="0.268000" />
      <dirtLevelMin value="0.000000" />
      <dirtLevelMax value="0.450000" />
      <envEffScaleMin value="0.000000" />
      <envEffScaleMax value="1.000000" />
      <envEffScaleMin2 value="0.000000" />
      <envEffScaleMax2 value="1.000000" />
      <damageMapScale value="0.600000" />
      <damageOffsetScale value="1.000000" />
      <diffuseTint value="0x00FFFFFF" />
      <steerWheelMult value="1.000000" />
      <HDTextureDist value="5.000000" />
      <lodDistances content="float_array">
      450.000000    
      460.000000    
      470.000000    
      480.000000    
      500.000000    
      500.000000 
      </lodDistances>
      <minSeatHeight value="0.812" />
      <identicalModelSpawnDistance value="20" />
      <maxNumOfSameColor value="1" />
      <defaultBodyHealth value="1000.000000" />
      <pretendOccupantsScale value="1.000000" />
      <visibleSpawnDistScale value="1.000000" />
      <trackerPathWidth value="2.000000" />
      <weaponForceMult value="1.000000" />
      <frequency value="30" />
      <swankness>SWANKNESS_4</swankness>
      <maxNum value="2" />
      <flags>FLAG_HAS_PARACHUTE FLAG_BOOT_IN_FRONT FLAG_SPORTS FLAG_SPAWN_ON_TRAILER FLAG_RICH_CAR FLAG_NO_BROKEN_DOWN_SCENARIO FLAG_HAS_INTERIOR_EXTRAS</flags>
      <type>VEHICLE_TYPE_CAR</type>
      <plateType>VPT_BACK_PLATES</plateType>
	  <dashboardType>VDT_SUPERGT</dashboardType>
      <vehicleClass>VC_SPORT</vehicleClass>
      <wheelType>VWT_HIEND</wheelType>
      <trailers />
      <additionalTrailers />
      <drivers />
      <extraIncludes />
      <doorsWithCollisionWhenClosed />
      <driveableDoors />
      <bumpersNeedToCollideWithMap value="false" />
      <needsRopeTexture value="false" />
      <requiredExtras />
      <rewards />
      <cinematicPartCamera>
        <Item>WHEEL_FRONT_RIGHT_CAMERA</Item>
        <Item>WHEEL_FRONT_LEFT_CAMERA</Item>
        <Item>WHEEL_REAR_RIGHT_CAMERA</Item>
        <Item>WHEEL_REAR_LEFT_CAMERA</Item>
      </cinematicPartCamera>
      <NmBraceOverrideSet />
      <buoyancySphereOffset x="0.000000" y="0.000000" z="0.000000" />
      <buoyancySphereSizeScale value="1.000000" />
<!-- Example of adding extra vfx water samples
      <additionalVfxWaterSamples>
	<Item>
	  <position x="2.0" y="0.0" z="0.0" />
	  <size value="0.8" />
	</Item>
	<Item>
	  <position x="-2.0" y="0.0" z="0.0" />
	  <size value="0.8" />
	</Item>
	<Item>
	  <position x="0.0" y="0.0" z="2.0" />
	  <size value="1.0" />
	</Item>
      </additionalVfxWaterSamples>
-->
      <pOverrideRagdollThreshold type="NULL" />
	  <firstPersonDrivebyData>
        <Item>LOW_RAPIDGT_FRONT_LEFT</Item>
        <Item>LOW_RAPIDGT_FRONT_RIGHT</Item>
      </firstPersonDrivebyData>
    </Item>

Tested on Abdulrhman1's 2017 Audi R8 V10 add-on mod.

Will work on ANY vehicle. How to use? The same. Go airborne and hold SPACE.