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Solid Roller Valve Springs, 200 Lbs Seat w/ up to .675" lift, SB & BB Chevy, SB & BB Ford, 351C and more

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Product Description

 Dual Solid Roller Valve Springs

.675" Lift Dual Valve Springs, Mechanical Roller- Sold in sets of sixteen


Running a mechanical roller w/ up to .675" lift at the valve?

USA made, dual mechanical roller springs are an excellent choice for solid roller street cam applications running up to .680" final lift at the valve.

These are the same springs many well known US aftermarket head manufacturers use for their assembled heads intended for roller cams. It's probably the most popular, well known production roller spring in use today.

These come directly from Pioneer Automotive who uses an OEM spring manufacturer located right here in the USA- Good stuff indeed!

Universal fit for many applications. The heads need to have a spring base big enough to house the spring and enough valve length to obtain the required installed height of around 1.900" for 200Lbs seat pressure.


      Popular applications they're used on:

  • Big Block Chevy
  • *Small Block Chevy
  • *SB Ford w/ flat spring base (stepped base heads require spring seat machining.)
  • 351 Cleveland w/ flat spring base (stepped base heads require spring seat machining.)
  • FE Ford w/ flat spring base (stepped base heads require spring seat machining.)
  • Any head with 1.550" diameter base and the ability to achieve a 1.900" installed height

* OE Ford heads with a stepped spring base must have them machined flat.

* SBC, SBF will  require longer then stock valves to obtain 1.900" installed height.


     Buyer Gets:

  • Sixteen 1.550" OD Roller Springs

These springs are intended for either OE heads with spring seats machined to accept 1.550" OD springs or aftermarket heads designed for 1.550" springs.


  • 1.550" O.D
  • 1.125" Outer Coil I.D.
  • .722" I.D.
  •  200Lbs @ 1.900"
  •  536 Lbs @ .675" Lift
  • Coil Bind 1.165"
  • Applications must have a Flat Spring Base
*Note: To determine actual lift at the valve, deduct the lash setting from the gross lift figure.
Example: Gross valve lift .680" less .024" = .656" lift at the valve.



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