Home - Return to Previous Page
Click on image to zoom

JE Pistons 314691 - Ford 5.4L 4V FSR Pistons -34.6cc Dish, 3.701" Bore, 4.165" Stroke, 6.657" Rod Length, 1.320" CD, .866" Pin

8.5:1 Compression Ratio
Pricing: $970.84
Free Shipping!



Part Number  314691
Application Ford Modular 5.4L 4V 
Bore  3.701" 
Cubic Inch  358 CI 
Stroke  4.165" 
Rod Length  6.657" 
Compression Height  1.320"
Piston Volume -34.6cc
Piston Skirt Design  Strutted - Forged Side Relief 
Piston Average Weight  354g
Compression Ratio 8.5:1 
Included Wrist Pin 866-2250-15-51C
Wrist Pin Material  5115 Alloy 
Wrist Pin Dimension  .866" x 2.250" x .150" Wall - 98g 
Optional Wrist Pin Upgrade 866-2250-23-93C
Optional Wrist Pin Material  9310 Alloy
Optional Wrist Pin Dimesions .866" x 2.250" x .230" Wall - 132g
Ring Stack  1.2mm x 1.5mm x 3mm 
Recommended Piston Ring Set  JG1008-3701
Recommended Piston Ring Details  Gas Nitrided Steel Top, Ductile Iron Napier Cut 2nd, Low Tension Oil 

These JE FSR Pistons are specifically designed for high horsepower Ford Modular applications. The new FSR - Forged Side Relief strutted forging allows for a good amount of weight savings while adding material where it's needed for extra strength. This particular set of Pistons fits the 5.4L 4V Engine and has valve reliefs to accommodate aftermarket camshafts. The 5.4L specific pistons have a raised compression height bringing the piston crown closer to the top of the deck. The stock 5.4L pistons sit down in the bore around .120" which is not very efficient. By bringing the crown of the piston closer to the deck of the block, combustion efficiency and flame travel is significantly improved. Supplied with .150" Wall 5115 Alloy Wrist Pins. Optional .230" Wall 9310 Alloy Wrist Pins available as an upgrade and suggested for 700 + HP. 



  • JEP-314691
  • JEP-314691
  • JE Pistons
  • New


Shipping Information

  • Item Requires Shipping
  • 12.0 lbs.
  • W12.0000” 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.