Just by looking at them, you can tell which is for the front and rear.

What about left and right?

Fresh out of the box, it's labeled. What if they are used? Can you tell by looking at them?

Also, are there stamp parts number on the springs? Both OEM and aftermarket.

Asking this question because considering getting some used springs. And not sure if any printed numbers (if there are any) would be worn off over time.

TIA

 

Left to right doesn't matter. As long as you get the Front/rear right you'll be just fine.

 

front and rear (depending on company) ground control for example hqas the spring rates stamped on them so you know where they go, as far as side to side. nnot important