The best way to gain horse power in your truck is upgrading to performance parts. The main thing to upgrade in your truck to gain horse power to is your motor. A couple things to upgrade in the motor are air, fuel, and spark. You can do quite a few things while upgrading the air system whether you leave it naturally aspirated or with force induction with a turbocharger or a supercharger. While upgrading spark you can put better spark plugs in it and adjust the spark plug gap to get optimal timing. Lastly when upgrading fuel you can put better fuel injectors in it or run a higher fuel grade. once you’ve done all of that your motor will be built.
Once you’ve got as much horse power out of your motor as you want then you are probably going to need to upgrade your transmission. The main things to upgrade in your transmission are torque converters, shift kits, and clutch packs. When upgrading your torque converter you have a better throttle response and reduces slippage. Upgraded shift kits make your shifts more efficient and precise. Upgrading your clutch packs gains the ability to handle more power and torque.