This is if you want to try it out to modernize some of the vehicles with proper engine sounds, but, ONLY
Copy for the engine sound files, if you go to the RAGE Audio tool method. Or just copy & paste the sound
files, if you go to the FLA method.

-ALT1: Dominator with the V_STYLE_2 if you want to make it more angrier & growler, here's the set-up
for those who want to make it sound like it has a forged Supercharged Modular V8 sound:

[dominator]
structType = 0
field_1 = 41477
flags = 0xAA628 
floatAsInt_A = -22.0
floatAsInt_E = -2.0
engineLowSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENGINE_LOW
engineHighSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENGINE_HIGH
exhaustLowSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EXHAUST_LOW
exhaustHighSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EXHAUST_HIGH
revsOffSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_REVS_OFF
field_26 = 660.0
field_2A = 450.0
floatAsInt_2E = -2.63
floatAsInt_32 = -0.32
field_36 = 4000.0
field_3A = 1500.0
floatAsInt_3E = -4.32
floatAsInt_42 = -0.53
field_46 = 278.0
field_4A = 100.0
floatAsInt_4E = -3.26
floatAsInt_52 = 2.74
field_56 = 180.0
field_5A = 140.0
floatAsInt_5E = 5.0
floatAsInt_62 = 6.0
floatAsInt_66 = 2.0
field_6A = 50.0
field_6E = 50.0
floatAsInt_72 = 0.0
floatAsInt_76 = -6.0
engineWaveShape = ENGINE_WAVE_SHAPE
floatAsInt_7E = 0.0
exhaustWaveShape = WAVESHAPER_CURVES_OVERDRIVE
floatAsInt_86 = 0.0
floatAsInt_multiplier1200_8A = -0.5
floatAsInt_multiplier1200_8E = 1.125
engineIdleLoopSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENG_IDLE_LOOP
exhaustIdleLoopSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EX_IDLE_LOOP
floatAsInt_multiplier1200_9A = -0.166667
floatAsInt_multiplier1200_9E = 1.0
transmissionSound = VEHICLES_TRANSMISSION_1
floatAsInt_A6 = -8.0
floatAsInt_AA = 4.0
sound_AE = VEHICLES_ENGINE_RESIDENT_NULL_LOOP
floatAsInt_B2 = 0.0
floatAsInt_B6 = 0.0
exhaustPopSound = EX_POPS_MT
airIntakeSound = TURBO_3_WRAP
floatAsInt_multiplier1200_C2 = -0.5
floatAsInt_multiplier1200_C6 = 0.666667
dumpValveSound = NULL_SOUND
startSound = STREAMED_VEHICLES_V_STYLE_2_V_STYLE_2_START_DIST
hornSound = BOBCAT_MULTI_HORN
openSound = VEHICLES_EXTRAS_SPORTS_LUX_OPEN
closeSound = SUV_DOOR_CLOSE_RND
trunkOpenSound = VEHICLES_EXTRAS_SPORTS_TRUNK_OPEN
trunkCloseSound = VEHICLES_EXTRAS_LUX_SUV_TRUNK_CLOSE
field_E6 = 0.5
suspensionUpSound = PNEUMATIC_SUSPENSION_UP
suspensionDownSound = PNEUMATIC_SUSPENSION_DOWN
field_F2 = 0.4
field_F6 = 1.0
policeScannerManufacturerSound = POLICE_SCANNER_MANUFACTURER_MAN_VAPID
policeScannerModelSound = POLICE_SCANNER_MODEL_MOD_GT
policeScannerVehicleCategorySound = POLICE_SCANNER_VEHICLE_CATEGORY_SPORTS_CAR
gearTransmissionSound = VEHICLES_ENGINE_RESIDENT_GEAR_TRANSMISSION
floatAsInt_multiplier1200_10A = 0.333333
floatAsInt_multiplier1200_10E = 1.5
floatAsInt_multiplier1200_112 = 1.0
floatAsInt_116 = 0.0
field_11A = 25
floatAsInt_11E = 0.0
floatAsInt_122 = 3.0
floatAsInt_126 = 6.0
jumpLandSound = VEHICLE_JUMP_LAND
field_12E = 31
field_132 = 36
ignitionSound = IGNITION
engineShutDownSound = VEHICLES_ENGINE_RESIDENT_SHUT_DOWN_1
field_13E = 0
field_13F = 0
field_140 = 1
field_141 = 9
indicatorVehicleOn = VEHICLES_EXTRAS_INDICATOR_MODERN_CAR_ON
indicatorVehicleOff = VEHICLES_EXTRAS_INDICATOR_MODERN_CAR_OFF
engineCoolingFan = NULL_SOUND
handbrakeSound_14E = NULL_SOUND
sound_152 = NULL_SOUND
sound_156 = NULL_SOUND
handbrakeSound_15A = VEHICLES_EXTRAS_V_ENGINE_HANDBRAKE
field_15E = 1
field_15F = 0
field_160 = 0

-ALT2: Huntley with the V_STYLE_2 so now the SUV from Yardies can pack a punch from a supercharged V8
rather than a whiny & dreary Turbocharged V6:

[huntley]
structType = 0
field_1 = 41722
flags = 0x2AA62A 
floatAsInt_A = -8.0
floatAsInt_E = -4.0
engineLowSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENGINE_LOW
engineHighSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENGINE_HIGH
exhaustLowSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EXHAUST_LOW
exhaustHighSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EXHAUST_HIGH
revsOffSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_REVS_OFF
field_26 = 350.0
field_2A = 250.0
floatAsInt_2E = 2.91
floatAsInt_32 = -0.97
field_36 = 750.0
field_3A = 400.0
floatAsInt_3E = -3.21
floatAsInt_42 = 3.21
field_46 = 348.0
field_4A = 120.0
floatAsInt_4E = -3.37
floatAsInt_52 = 3.0
field_56 = 174.0
field_5A = 80.0
floatAsInt_5E = 1.0
floatAsInt_62 = 4.0
floatAsInt_66 = 1.0
field_6A = 50.0
field_6E = 50.0
floatAsInt_72 = 0.0
floatAsInt_76 = -8.0
engineWaveShape = ENGINE_WAVE_SHAPE
floatAsInt_7E = 0.0
exhaustWaveShape = EXHAUST_WAVE_SHAPE
floatAsInt_86 = 0.0
floatAsInt_multiplier1200_8A = -0.5
floatAsInt_multiplier1200_8E = 1.0
engineIdleLoopSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENG_IDLE_LOOP
exhaustIdleLoopSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EX_IDLE_LOOP
floatAsInt_multiplier1200_9A = -0.25
floatAsInt_multiplier1200_9E = 1.0
transmissionSound = VEHICLES_TRANSMISSION_1
floatAsInt_A6 = -8.0
floatAsInt_AA = 4.0
sound_AE = VEHICLES_ENGINE_RESIDENT_NULL_LOOP
floatAsInt_B2 = -8.0
floatAsInt_B6 = 0.0
exhaustPopSound = NULL_SOUND
airIntakeSound = TURBO_3_WRAP
floatAsInt_multiplier1200_C2 = 0.0
floatAsInt_multiplier1200_C6 = 0.666667
dumpValveSound = NULL_SOUND
startSound = STREAMED_VEHICLES_V_STYLE_2_V_STYLE_2_START_DIST
hornSound = VINCENT_MULTI_HORN
openSound = VEHICLES_EXTRAS_LUXURY_OPEN
closeSound = LUXURY_DOOR_CLOSE_RND
trunkOpenSound = VEHICLES_EXTRAS_LUX_SUV_TRUNK_OPEN
trunkCloseSound = VEHICLES_EXTRAS_LUX_SUV_TRUNK_CLOSE
field_E6 = 0.5
suspensionUpSound = PNEUMATIC_SUSPENSION_UP
suspensionDownSound = PNEUMATIC_SUSPENSION_DOWN
field_F2 = 0.4
field_F6 = 1.0
policeScannerManufacturerSound = POLICE_SCANNER_MANUFACTURER_MAN_VAPID
policeScannerModelSound = POLICE_SCANNER_MODEL_MOD_HUNTLEY
policeScannerVehicleCategorySound = POLICE_SCANNER_VEHICLE_CATEGORY_SUV
gearTransmissionSound = VEHICLES_ENGINE_RESIDENT_GEAR_TRANSMISSION
floatAsInt_multiplier1200_10A = 0.5
floatAsInt_multiplier1200_10E = 1.83333
floatAsInt_multiplier1200_112 = 0.833333
floatAsInt_116 = 0.0
field_11A = 50
floatAsInt_11E = 0.0
floatAsInt_122 = 3.0
floatAsInt_126 = 8.0
jumpLandSound = VEHICLE_JUMP_LAND
field_12E = 31
field_132 = 36
ignitionSound = IGNITION
engineShutDownSound = VEHICLES_ENGINE_RESIDENT_SHUT_DOWN_1
field_13E = 2
field_13F = 1
field_140 = 1
field_141 = 11
indicatorVehicleOn = VEHICLES_EXTRAS_INDICATOR_MODERN_CAR_ON
indicatorVehicleOff = VEHICLES_EXTRAS_INDICATOR_MODERN_CAR_OFF
engineCoolingFan = ENGINE_COOLING_FAN
handbrakeSound_14E = NULL_SOUND
sound_152 = NULL_SOUND
sound_156 = NULL_SOUND
handbrakeSound_15A = VEHICLES_EXTRAS_STANDARD_HANDBRAKE
field_15E = 1
field_15F = 0
field_160 = 0

-ALT3: Stallion with the V_STYLE_2 If you want to turn aournd the engine sounds (in case of pass the V_STYLE_2 for Thundersmacker's
Stallion S & keep it the MUSCLE_CAR_3 sound instead) this alternative will work for you, in case if you added a powerful engine sound
for the vanilla Stallion engine sound, but, you want to keep the appeal of a convertible muscle car that is much more a "Easy-cruiser" 
than a  louder "Power-house":

[stalion]
structType = 0
field_1 = 41359
flags = 0xAA628 
floatAsInt_A = -21.0
floatAsInt_E = -2.0
engineLowSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENGINE_LOW
engineHighSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENGINE_HIGH
exhaustLowSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EXHAUST_LOW
exhaustHighSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EXHAUST_HIGH
revsOffSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_REVS_OFF
field_26 = 660.0
field_2A = 450.0
floatAsInt_2E = -2.63
floatAsInt_32 = 0.32
field_36 = 4000.0
field_3A = 1500.0
floatAsInt_3E = -4.32
floatAsInt_42 = -0.53
field_46 = 278.0
field_4A = 100.0
floatAsInt_4E = -3.26
floatAsInt_52 = 2.74
field_56 = 180.0
field_5A = 140.0
floatAsInt_5E = 5.0
floatAsInt_62 = 6.0
floatAsInt_66 = 2.0
field_6A = 50.0
field_6E = 50.0
floatAsInt_72 = 0.0
floatAsInt_76 = -6.0
engineWaveShape = ENGINE_WAVE_SHAPE
floatAsInt_7E = 0.0
exhaustWaveShape = EXHAUST_WAVE_SHAPE
floatAsInt_86 = 0.0
floatAsInt_multiplier1200_8A = -0.5
floatAsInt_multiplier1200_8E = 1.125
engineIdleLoopSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_ENG_IDLE_LOOP
exhaustIdleLoopSound = VEHICLES_ENGINE_RESIDENT_V_STYLE_2_EX_IDLE_LOOP
floatAsInt_multiplier1200_9A = 0.0
floatAsInt_multiplier1200_9E = 1.0
transmissionSound = VEHICLES_TRANSMISSION_1
floatAsInt_A6 = -8.0
floatAsInt_AA = 4.0
sound_AE = NULL
floatAsInt_B2 = 0.0
floatAsInt_B6 = 0.0
exhaustPopSound = NULL_SOUND
airIntakeSound = AIR_INTAKES_MULTI_QUIET
floatAsInt_multiplier1200_C2 = -0.333333
floatAsInt_multiplier1200_C6 = 1.375
dumpValveSound = NULL_SOUND
startSound = STREAMED_VEHICLES_V_STYLE_2_V_STYLE_2_START_DIST
hornSound = STALION_HORN
openSound = VEHICLES_EXTRAS_MUSCLE_CAR_OPEN
closeSound = MUSCLE_DOOR_CLOSE_RND
trunkOpenSound = VEHICLES_EXTRAS_MUSCLE_TRUNK_OPEN
trunkCloseSound = VEHICLES_EXTRAS_MUSCLE_TRUNK_CLOSE
field_E6 = 0.5
suspensionUpSound = SUSPENSION_UP
suspensionDownSound = SUSPENSION_UP
field_F2 = 0.4
field_F6 = 1.0
policeScannerManufacturerSound = POLICE_SCANNER_MANUFACTURER_MAN_CLASSIQUE
policeScannerModelSound = POLICE_SCANNER_MODEL_MOD_STALLION
policeScannerVehicleCategorySound = POLICE_SCANNER_VEHICLE_CATEGORY_TWO_DOOR
gearTransmissionSound = VEHICLES_ENGINE_RESIDENT_GEAR_TRANSMISSION
floatAsInt_multiplier1200_10A = 0.333333
floatAsInt_multiplier1200_10E = 1.5
floatAsInt_multiplier1200_112 = 1.0
floatAsInt_116 = 0.0
field_11A = 25
floatAsInt_11E = 0.0
floatAsInt_122 = 0.0
floatAsInt_126 = 6.0
jumpLandSound = VEHICLE_JUMP_LAND
field_12E = 31
field_132 = 36
ignitionSound = IGNITION
engineShutDownSound = VEHICLES_ENGINE_RESIDENT_SHUT_DOWN_1
field_13E = 0
field_13F = 0
field_140 = 1
field_141 = 9
indicatorVehicleOn = VEHICLES_EXTRAS_INDICATOR_OLD_CAR_ON
indicatorVehicleOff = VEHICLES_EXTRAS_INDICATOR_OLD_CAR_OFF
engineCoolingFan = NULL_SOUND
handbrakeSound_14E = NULL_SOUND
sound_152 = NULL_SOUND
sound_156 = NULL_SOUND
handbrakeSound_15A = VEHICLES_EXTRAS_V_ENGINE_HANDBRAKE
field_15E = 0
field_15F = 0
field_160 = 0

-ALT4: Another gang vehicle that nows can take it seriously, in this case; the North Korean Mob's Presidente has a proper "V10"
Sounds louder than whinier:

[pres]
structType = 0
field_1 = 41629
flags = 0x2AA62A 
floatAsInt_A = -9.0
floatAsInt_E = -4.0
engineLowSound = VEHICLES_ENGINE_RESIDENT_MUSCLE_CAR_1_ENGINE_LOW
engineHighSound = VEHICLES_ENGINE_RESIDENT_MUSCLE_CAR_1_ENGINE_HIGH
exhaustLowSound = VEHICLES_ENGINE_RESIDENT_MUSCLE_CAR_1_EXHAUST_LOW
exhaustHighSound = VEHICLES_ENGINE_RESIDENT_MUSCLE_CAR_1_EXHAUST_HIGH
revsOffSound = VEHICLES_ENGINE_RESIDENT_MUSCLE_CAR_1_REVS_OFF
field_26 = 350.0
field_2A = 250.0
floatAsInt_2E = 2.91
floatAsInt_32 = -0.97
field_36 = 750.0
field_3A = 400.0
floatAsInt_3E = -3.21
floatAsInt_42 = 3.21
field_46 = 348.0
field_4A = 120.0
floatAsInt_4E = -3.37
floatAsInt_52 = 1.02
field_56 = 174.0
field_5A = 80.0
floatAsInt_5E = 1.0
floatAsInt_62 = 4.0
floatAsInt_66 = 1.0
field_6A = 50.0
field_6E = 50.0
floatAsInt_72 = 0.0
floatAsInt_76 = -8.0
engineWaveShape = ENGINE_WAVE_SHAPE
floatAsInt_7E = 0.0
exhaustWaveShape = WAVESHAPER_CURVES_OVERDRIVE
floatAsInt_86 = 0.0
floatAsInt_multiplier1200_8A = -0.5
floatAsInt_multiplier1200_8E = 1.0
engineIdleLoopSound = VEHICLES_ENGINE_RESIDENT_MUSCLE_CAR_1_ENG_IDLE_LOOP
exhaustIdleLoopSound = VEHICLES_ENGINE_RESIDENT_MUSCLE_CAR_1_EX_IDLE_LOOP
floatAsInt_multiplier1200_9A = -0.25
floatAsInt_multiplier1200_9E = 1.0
transmissionSound = VEHICLES_TRANSMISSION_1
floatAsInt_A6 = -8.0
floatAsInt_AA = 4.0
sound_AE = VEHICLES_ENGINE_RESIDENT_NULL_LOOP
floatAsInt_B2 = -8.0
floatAsInt_B6 = 0.0
exhaustPopSound = NULL_SOUND
airIntakeSound = AIR_INTAKE_1_LOUD
floatAsInt_multiplier1200_C2 = 0.166667
floatAsInt_multiplier1200_C6 = 0.833333
dumpValveSound = NULL_SOUND
startSound = STREAMED_VEHICLES_MUSCLE_CAR_1_MUSCLE_CAR_1_START_DIST
hornSound = PRESIDENTE_MULTI_HORN
openSound = VEHICLES_EXTRAS_LUXURY_OPEN
closeSound = LUXURY_DOOR_CLOSE_RND
trunkOpenSound = VEHICLES_EXTRAS_LUX_SUV_TRUNK_OPEN
trunkCloseSound = VEHICLES_EXTRAS_LUX_SUV_TRUNK_CLOSE
field_E6 = 0.5
suspensionUpSound = PNEUMATIC_SUSPENSION_UP
suspensionDownSound = PNEUMATIC_SUSPENSION_DOWN
field_F2 = 0.4
field_F6 = 1.0
policeScannerManufacturerSound = POLICE_SCANNER_MANUFACTURER_MAN_ALBANY
policeScannerModelSound = POLICE_SCANNER_MODEL_MOD_PRES
policeScannerVehicleCategorySound = POLICE_SCANNER_VEHICLE_CATEGORY_SEDAN
gearTransmissionSound = VEHICLES_ENGINE_RESIDENT_GEAR_TRANSMISSION
floatAsInt_multiplier1200_10A = 0.5
floatAsInt_multiplier1200_10E = 1.83333
floatAsInt_multiplier1200_112 = 0.833333
floatAsInt_116 = 0.0
field_11A = 50
floatAsInt_11E = 0.0
floatAsInt_122 = 3.0
floatAsInt_126 = 8.0
jumpLandSound = VEHICLE_JUMP_LAND
field_12E = 31
field_132 = 36
ignitionSound = IGNITION
engineShutDownSound = VEHICLES_ENGINE_RESIDENT_SHUT_DOWN_1
field_13E = 2
field_13F = 1
field_140 = 1
field_141 = 11
indicatorVehicleOn = VEHICLES_EXTRAS_INDICATOR_MODERN_CAR_ON
indicatorVehicleOff = VEHICLES_EXTRAS_INDICATOR_MODERN_CAR_OFF
engineCoolingFan = ENGINE_COOLING_FAN
handbrakeSound_14E = NULL_SOUND
sound_152 = NULL_SOUND
sound_156 = NULL_SOUND
handbrakeSound_15A = VEHICLES_EXTRAS_STANDARD_HANDBRAKE
field_15E = 0
field_15F = 0
field_160 = 4