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FE FORD 352-428, Drop In Valve Spring Kit, Hyd Flat Tappet Engines, Max Output II, Vsk9j-FM2, ships around 30 days after ordering.

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Calculated at checkout

Product Description

 Fits most OE FE Ford iron castings

MAX OUTPUT II Drop in Valve Spring Kit, for 3/8" Valves

Application: FE FORD, 352, 360, 390, 410, 427 & 428 w/ Hydraulic Flat Tappet cams.


Current processing time is 30 days. This means the kit will ship in around 30 days after your order has been completed.


Our Drop in valve spring kits for FE Ford are intended for OE heads w/ a stepped spring base. This is good news for most FE builders as the stepped base head was the most common version Ford produced.

Alex's Parts offers several drop in kits for FE Ford; with std cylindrical springs and beehive.

Max Output II kits are for moderately hot cams, normally w/ between 234-250 degrees duration @ .050"

If you need springs for shorter duration cams, take a look at our other drop in style kits including a beehive version.

We also offer drop in kits for FE's with mechanical/solid lifter cams. Check our other listings.


      Spring Specifications:

  • 1.487" Outside Diameter
  • 110 Lbs @ 1.830 Valve Closed Installed Height. * (Final installed heights can vary, use spec included w/ your kit.)
  • 302 Lbs @ .500" Lift
  • 323 Lbs @ .550" Lift
  • 345 Lbs @ .600" Lift
  • 355 Lbs @ .620" Lift
  • Max Lift- .620"
  • Average Coil Bind @ 1.120"
  • Spring seat machining is not required


     Kit includes:

  • Sixteen 7 Degree Chrome Moly Steel Retainers for 3/8" Stem Valves
  • 32 Hardened 3/8" 7 Degree Valve Locks
  • 16 Drop in Max Output II Valve Springs
  • Installed Height Specification Card



  • FE FORD 352-428 w/ 3/8" Stem Valves


Requirements- As with any performance aftermarket valve spring kit, spring installed heights should be measured and shimmed as necessary.

Please allow around 30 days for your kit to be built and shipped.

*Use the installed height spec card included with your kit.




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

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