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Diamond 30444-R1 Ford 5.4L 2VPI Competition Series Piston / Ring Kit -25.0cc Dish, 3.572" Bore - Upgraded H-13 Tool Steel Pins

Limited Supply: only 1 remaining
Was: $1,137.99
Sale: $1,081.09
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Save: $56.90

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Part Number  30444-R1
Application Ford Modular 5.4L 
Bore  3.572" 
Stroke  4.165" 
Rod Length  6.657" 
Compression Height  1.330"
Piston Volume -25.0cc
Ring Land Spacing  .280" x .180" x .080" 
Valve Reliefs 2VPI
Included Wrist Pin Upgrade Trend H8662500200C
Included Wrist Pin Material  H-13 Tool Steel 
Included Wrist Pin Dimesions .866" x 2.500" x .200" Wall - 132g
Ring Stack  1.2mm x 1.5mm x 3mm 
Included Piston Ring Set  09403572
Included Piston Ring Details  Gas Nitrided Steel Top, Napier 2nd, 3 Piece Oil  

The Diamond 5.4L Competition Series Pistons have a 1.330" Compression Height, which brings the Piston Crown right up to the top of the deck, just like the 4.6L. This is the correct way to enhance combustion efficiency as the OEM 5.4L pistons sit .120" down in the cylinder. These Pistons are supplied with Diamond's Moly Skirt Coating, H-13 Tool Steel Pins and a Steel Top, Napier 2nd Ring Set.



Compression Ratios

Compression Ratios Calculated with a 3.620" x .036" Head Gasket and .010" Deck Clearance

  2V TFS 38cc   2V PI 42cc   2V TFS 44cc   3V 51cc  4V 52cc 
 5.4L  -25.0cc Dish  10.7:1  10.2:1  9.9:1   9.2:1 9.1:1




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  • Item Requires Shipping
  • 16.0 lbs.
  • W28.0000” x H6.0000” x L12.0000”
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