Harold go back and read the poster's question again.
He knows he can add a bumper on the brake arm but he wants to know why should he need to when the truck came from the factory without one.
He knows there is a problem. Got any ideas?

Last edited by buoymaker; 05/27/2022 3:55 AM.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."