Loading... Please wait...


Become a member

Dual Valve Spring Kit, Hyd Flat Tappet, 110 Lbs Seat, 351C, BBF, SBF, SBC, 11/32" Universal, Includes: Springs, Retainers & Locks

  • Image 1
  • Image 2
  • Image 3
Calculated at checkout

Sorry but this item is currently unavailable.

Please check back at a later stage.

Product Description


High Lift Dual Valve Spring Kit

 Fitment: 351C- *(see note), BB Ford, SB Ford, SB Chevy & BBC w/ 11/32"


This dual spring kit is a great choice for many applications in need of dual springs.

Suited for several different cam types, they can be set up to work with: hyd flat tappet, mechanical flat tappet and many hyd roller cams. (not solid roller)

The springs can be installed to produce either 110Lbs, 120Lbs or 135Lbs to suit your cam of choice.


     An example of what type of cams  work with the various seat pressures.

  • Hyd Flat Tappet, High Performance Street- 110 Lbs Seat Pressure. 
  • Hyd Flat Tappet, High Performance Marine and Hot Street- 120 Lbs Seat Pressure 
  • Hyd Roller, Mild Performance Street- 120 Lbs Seat Pressure 
  • Hyd Roller, Mechanical Flat Tappet- 135 Lbs Seat Pressure 
  • These are considered general "rule of thumb" pressures.


As with any dual spring assemblies used on OEM iron heads, Valve spring seat seat machining is required except for BBC & select heads with a large spring base, the rest will require spring seat machining.


If you would like us to verify suitability for your application, please send us a message through the "contact us" link. Please include a link to your cam specs or the brand and part number for us to look it up with.

We'll need to see duration @ .050", lift and lifter type; Hyd, Hyd Roll, Mech FT and the type of usage- Street, Oval track, Drag, etc.


      Spring Specifications:

  • 1.470" Outside Diameter
  • .805" Inside Diameter
  • Coil Bind: 1.050"
  • Rate: 366#
  • 110 Lbs @ 1.850"
  • 120 Lbs @ 1.820"
  • 135 Lbs @ 1.775"
  • Max Lift @ 135 Lbs Seat- .650"
  • Part Number: 99893-A


     Open Pressures @ 135 Lb Seat

  • 317@ 1.285" (.500" Lift)
  • 339@ 1.235" (.550" Lift)
  • 361@ 1.185" (.600" Lift)
  • 383@ 1.135" (.650" Lift)


     Kit Includes:

  • Sixteen Dual Springs
  • Sixteen Chrome Moly Steel Retainers, 7 degree 11/32"
  • Full Set of Hardened 7 degree Locks, 11/32" (Single Groove)
  • Specification Sheet
  • Installed Height Diagram 
  • Not for Mechanical Roller.

Excellent valve control for many High Performance cams with between 228-250 degrees duration @ .050".


*NOTE- This kit is intended for 11/32" single groove valves and a flat spring base, not stepped. If used with OEM Ford heads, the spring base must be machined for both, inner and outer springs to sit on the same surface.


Alex's Parts- The smart choice in valve train parts~

Add to Wish List

Click the button below to add the Dual Valve Spring Kit, Hyd Flat Tappet, 110 Lbs Seat, 351C, BBF, SBF, SBC, 11/32" Universal, Includes: Springs, Retainers & Locks to your wish list.

You Recently Viewed...