These are "Beehive" style valve springs part of the RPM Series, designed for high-performance automotive engines like the GM LS, LT, and Mopar Gen III Hemi. : 408 lbs/in.
: Ideal for "weekend warriors" and high-RPM drag or circle track racing. Other References
: "1275X" is a specific key code for certain RV and vehicle locks, including Ford replacement keys.
: 16-ohm design, which is ideal for daisy-chaining multiple monitors together.
: Outside diameter of 1.290" and a coil bind height of 1.215".