Home - Return to Previous Page
Click on image to zoom

Diamond 30434-R1 Ford 5.4L Competition Series Piston / Ring Kit -11.5cc Dish, 3.562" Bore

Pricing: $883.99

Customize Your Item

- Select Valve Reliefs -
 * required
- Select Wrist Pins -
 * required
- Add Ceramic Dome Coating -
 * required
- Add Lateral Gas Ports -
 * required
Free Shipping!



Part Number  30434-R1
Application Ford Modular 5.4L 
Bore  3.562" 
Stroke  4.165" 
Rod Length  6.657" 
Compression Height  1.330"
Piston Volume -11.5cc
Ring Land Spacing  .280" x .180" x .080" 
Included Wrist Pin Trend G8662500180C
Wrist Pin Material  8620 Alloy  
Wrist Pin Dimension  .866" x 2.500" x .180" Wall - 123g 
Optional Wrist Pin Upgrade Trend H8662500200C
Optional Wrist Pin Material  H-13 Tool Steel 
Optional Wrist Pin Dimesions .866" x 2.500" x .200" Wall - 132g
Ring Stack  1.2mm x 1.5mm x 3mm 
Included Piston Ring Set  09403562
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, 8620 .180" Wall Wrist Pins and a Steel Top, Napier 2nd Ring Set. We suggest upgrading to the H-13 Tool Steel Wrist Pins around the 900 HP mark. 

These Pistons do not include valve reliefs but we can have them added for a small fee. Please note Pistons with the valve relief option are made to order, so please allow 2.5-3 weeks before shipping. 

Optional Upgrades:

  • H-13 Tool Steel Pins 
  • Ceramic Dome Coating 



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  -11.5cc Dish  12.9:1  12.1:1  11.8:1   10.7:1 10.6:1




Shipping Information

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

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.