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351 Cleveland, Drop In Valve Springs Kit, .580" Lift , Hyd Flat Tappet

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Product Description

 Fits Factory Heads, no machining required.

High Lift Valve Spring Kit for 351C

Application: Hydraulic Flat Tappet up to .580” Lift

Fitment: 351 Cleveland, 351/400M 

High Performance engine builders know the best way to improve durability on 351C engines is to replace the stock four groove valves with single groove.

Once single groove valves have been fitted, retainers and locks for single groove valves are used.

This kit is just that, for single groove valve 351C and M engines.

Intended for mild to moderate high performance Hydraulic flat tappet applications with up to around 226 degrees duration @ .050".

Need help figuring if these will work with your cam? Send us an e-mail with the cam specs or better yet, the cam brand & part number and a link to the specification page. We'd be happy to verify compatibility.

This kit works great with many of today's popular performance cams.


      Spring Specifications:

  • 1.460" Outside Diameter
  • 110 Lbs @ 1.820" (Hyd Flat Tappet Cams)
  • 260 Lbs @ .500" Lift
  • 288 Lbs @ .580" Lift
  • Spring seat machining NOT needed.
  • Fits most stock 2V and 4V heads.



     Kit includes:

  • Sixteen 7 Degree Chrome Moly Steel Retainers
  • 16 Single Groove 7 Degree Hardened Steel Locks
  • 16 Drop in High Performance Springs
  • Specification Sheet
  • Installed Height Diagram


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

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