Who makes the clone valve springs?

#1
Is there anything particularly special about them besides a "known" compression?
I know it might sound stupid but couldn't a hardware store spring of the proper compression and dimensions be used?
Metal fatigue after many compression cycles might be a problem.

I ask this crazy question because I saw a spring that looked identical to a valve spring on my 6.5 clone.:eek:ut:
 
#2
they're cheap enough that i'd just buy ones made for the motor instead of trying to save a few bucks with something that is questionable.
 
#6
Well the ones I got were free. Why spend 8 bucks if it is just some hardware store spring? That is kinda why I was asking who made the springs.

I know it is weird but I was more interested if the things are really specially made for engines rather than because I am a cheapskate although it is true.
 
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