I'm looking at a pair of springs from a donor truck f250/350. The number on the spring is (rpn 0612 2c34 ca) does anyone know how to decode this? I know it has an overload top spring. I'm looking for a two inch lift over stock springs.

Pic of springs

 

2c34 ca is an A code spring.

 

Isn't the "a code" an excursion spring only?And if so why would it have an overload? He claims it to be off of an 02 crew cab long bed 7.3l 4x4. I'm confused now.

 

That is a B code spring, Excursion is a G code.

 

For a 2002 F250 it shows to be an A code.

For a 2002 F350 it shows to be a B code.

The never ending wonders of my parts lookup catalogue.

 

Regardless of code, that part number has the same rates as what is commonly referred to as a B code, 320/670 lbs/in.