.675" Lift Conical Spring Kit w/ Tool Steel Retainers for GM LS1/LS3

The .675" Lift Conical Spring Kit w/ Tool Steel Retainers for GM LS1/LS3 allows users to easily install revolutionary Conical Valve Springs on any high performance GM LS1/LS3 engine.
Available Soon
Available Soon items may take 2-4 weeks for delivery.

The springs’ conical design features a smaller diameter in the upper half to reduce active mass. This reduction in mass, along with the progressive frequency created by the conical shape, dampens coil oscillations better than any other spring design. These improvements allow for the use of more aggressive camshafts and an increase in RPM limit speed. Finally, Superfinish processing of the springs results in increased durability and spring life.

Kit includes:

  • #7230-16 Conical Valve Springs
  • #1774-16 +.100 Tool Steel Retainers
  • #623-16 Valve Locks
  • #511-16 Valve Seals
  • #4680-16 Spring Seats


Retainer Material: Tool Steel
Spring Part #: 7230-16
Spring Style: Conical
Max Lift: 0.665
Installed Height: 1.9
O.D. of Outer: 1.060/1.332
I.D. of Outer: .660/.932
Spring Rate: 519
Seat Pressure: 145
Coil Bind Height: 1.175
Retainers Part #: 1774-16
Valve Locks Part #: 623-16
Valve Lock Type: 7° Steel
Valve Seals Part #: 511-16
Valve Seals Type: Steel Jacketed Viton
Spring Seats Part #: 4680-16
Spring Seats Type: I.D. Locator