[Tx Firefighter]

Originally Posted by SCOTI

This is ALL manufacturers as well.... Not just CPP. My Bell Tech spindles for my '99 OBS 3/4 ton truck have a different p/n cast into the spindle vs. the actual p/n required for my application.

They start w/one priority unit that gets the casting number & machine for the various other possible installation possibilities from there.

My experience as well. All Belltech spindles for 1/2 ton trucks 88-98 have part number 2400 cast into the backside of them. The part number 2500 spindle that is so common on these applications still says 2400 on the back but they simply press a longer spud into the casting to accommodate the thicker rotors.