Proflow's High Performance valve springs for the LS Engine. When you upgrade the cam, you need to upgrade valve springs to match. Micro-engineered surface finish for maximum durability, Multilayer fatigue enhancement, eliminating potential surface defects and prolonging spring life, Proprietary heat-treat process for added strength and optimized residual stress, Beehive and conical spring geometries, reducing dynamic surges for exceptional valvetrain harmonics.

  • Valve Springs Series: Performance Valve Springs
  • Number Of Coils: Single Spring
  • Damper Spring: No
  • Overall Diameter: 1.130, 1.185 in.
  • Inside Diameter: 0.885, 0.731 in.
  • Seat Pressure: 127 lbs. @ 1.850 in.
  • Open Pressure: 370 lbs. @ 1.150 in.
  • Coil Bind: 1.100 in.
  • Spring Rate (lbs./in.): 372 lbs/in.
  • Quantity: Sold As Set (16/pkg)