Do PAC 1518 springs drop-in to 5.3L heads?
10-09-2009, 07:29 AM
#21
The alloy they are made from is brittle when cold and needs reaching operating temperature to gain elasticity if you wish. (but is more an issue of harmonic vibrations than tentional stretch)
All new springs have to go through atleast 2>3 heat cycles before being beaten on.
All new springs have to go through atleast 2>3 heat cycles before being beaten on.
