doesa bigger air horn and air intake make youy truck run cooler?

 

It does lower the egt's.

 

yes it will make your truck a bit cooler the air intake will do the most were the intake horn is more for looks in my opinion i havent ever seen any truck with different egts with a stock one compaired to an aftermarket one. i built a 3" one for my truck and it only helped with looks unless you get the banks twin ram with 2 intake horns to spilt the air between cylanders but they are $600