Can anybody tell what size throttle body come standard on a 2005 5.4 3valve motor. I am thinking of going bigger but need to know what is on there now. Thanks

 

I believe it was 75mm.

Be careful though in increasing the airflow in a stock tuned 5.4. What can happen to these engines with more air being thrown at them is that they can run lean, and needs a tuner and tune to correct the fuel to air mapping. Many vendors that sell these along with CAI's provide a warning for the consumer about the use of the product, stating that it can cause the truck to run lean and cause other problems that they will not be held responsible for.

 

Thanks for letting me know. I have to have it custom tuned due to the cams I put in it when rebuilt.