Very similar to the Pac 1219 valve spring.
Nitro Black Beehive Valve Springs
Super Clean Chrome Silicon Vanadium Nickel Alloy
• Beehive shaped design allows a reduced retainer end
mass for improved RPM potential
• Every spring goes through a multiple shot peening process to ensure
maximum durability and stress relief
• “Heat Set” process and special heat treatment are used to extend spring life and minimize load loss
• Ovate wire shape more evenly distributes mass throughout the wire cross section
Number of Springs Per Valve: Single
Outside Diameter of Outer Spring (in): 1.292 in.
Coil Bind Height (in): 1.100 in.
Damper Spring Included: No
Spring Rate (lbs/in): 322lbs./in.
Install Height: 105 @ 1.800
Open Load: 300 @ 1.150
Max Lift: .625
Inside Diameter of Outer Spring (in): 0.885 in.
Inside Diameter of Inner Spring (in): 0.650 in.
Valve Spring Style: Beehive Valve Springs
Coated: No Quantity: 16 Springs