open GAME.SII
THEN LOOK FOR SOMETHING THAT SAYS

vehicle_engine_accessory : _nameless.151C.F740 {
torque: ORIGINAL NUMBER
front_wheel_engine: false
performance: 0
wear: &3c17b95e
price: 3000
name: "@@acc_engine_universal@@"
mileage: 0
suitable_vehicles: 1
suitable_vehicles[0]: all
info: 0

CHANGE TORQUE THE NUMBER AFTER TORQUE TO 444000

THEN UNDER THAT THERE IS THE TRANSMISSION ACCESORY 

CHANGE THE NUMBER AFTER 
RMP_LIMIT TO
2289000

THEN UNDER THAT FIND BRAKE ACCESORY

AND CHANGE IT TO
14289000

THEN UNDER THAT FINDE 
VEICHLE WHEEL ACCESORY

AND CHANGE PERFORMANCE TO 4

NOTE FOR THOSE YOU CAN PICK YOUR OWN NUMBERS BUT AT THE SETTINGS I GAVE YOU YOUR TRUCK 
CAN GO WAY OVER 120 WITH OR WITHOUT A TRAILER IN LIKE 10 SECONDS

IF YOU CHAGE THE NUMBERS TO WHAT YOU DESIRE MAKE IT AN EVEN RATIO LIKE YOU CANT HAVE 
455555 TORQUE
HAVE 455555 RPM
AND HAVE 500 BRAKE TORQUE

BECAUSE THEN STOPPING IS EXTREMELY DIFFICULT AT HIGH SPEEDS

CREDITS TO ME RAUDEL SOLIS