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DSS Piston Kit K1-5000-4050; FX Forged 4.050 Bore, Flat Top for Ford 390 FE

Specifications

  • Piston and Rings Kit Series: FX Series
  • Year: 1958 to 1976
  • Make: Ford
  • Engine: 390 FE
  • Bore: 4.050 in.
  • Stroke: 3.784 in.
  • Rod Length: 6.489 in.
  • Compression Height: 1.775 in.
  • Crown Volume: 5.00 cc Flat Top
  • Cylinder Head Volume to Calculate Compression Ratio: 72.00 cc
  • Compression Ratio: 10.33:1
  • Pin Diameter: 0.975 in.
  • Piston Material: Forged 4032 Alloy
  • Ring Lands: 1.2, 1.2, 3mm
  • Top Ring Type: Moly
  • Second Ring Type: Iron
  • Oil Ring Tension: Standard
  • Gas Porting: None
  • Notes: FE Flat Top
  • Quantity: Sold As Kit (8/pkg)

Features

  • 4032 Alloy
  • Strong, Endurance Minded, Wear Resistant, Low Maintenance, 4032 Alloy
  • Substantially Stronger than Hypereutectic Type Cast Pistons
  • Proprietary "DMAX" Multi Stage Forging Process, Produces' a Superior Forging
  • Drilled Forced Wrist Pin Oiling
  • Drilled Bottom Ring Land Intersecting Oil Drain Backs
  • Forged and Machined in Saint Charles Illinois USA!
  • Boost and NOS Ready! (Moderate to High Levels)
  • Fully Machined Piston Crown
  • Advanced Profile Precision Diamond-Turned Skirts
  • Larger CNC Machined Valve Reliefs for More Aggressive Head & Cam Combinations
  • Heavy-Duty Piston Pins
  • Precision CNC Finished Pin Bores
  • Double True Arc Pin Locks Provide Redundancy
  • Full-Floating or Press Fit
  • Includes matching DSS Racing ring set
  • Advanced Ring Lands Featuring a Combination of Accumulators and Drilling Ops.
  • 6 additional areas of CNC milling for weight reduction in non critical areas.
  • Thinner Ring Grooves Maximize Critical Ring Land Strength
  • Patented "X Groove" Skirt for Superior Cylinder & Ring Performance & Durability
  • CNC Tear out notch makes optional Spiro Locs removal easy.

Description

390 FE Ford, K1 FX 4032 Alloy, Comp Height: 1.775", -5cc Flat Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.784", ROD: 6.489", Includes matching DSS Racing ring set, Appox Comp Ratio: 65cc-11.18, 72cc-10.36, 76cc-9.93 NOTE: Effective July 7, 2025, all FE Ford ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.

WARNING: This product can expose you to chemicals including chromium, known to the State of California to cause cancer and birth defects or other reproductive harm. More info

Store Policies

Payment

Please make payment within 7 days of auction end.

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  • Wait for the return to process and refund to be received. This process may take up to 5 days. Most returns are processed within 24 hours.

    • Warranty

    Most parts come with a limited manufacturer's warranty on the part ONLY. This warranty DOES NOT include labor cost for installation and removal or shipping. PERFORMANCE PARTS HAS NO WARRANTY, EXPRESSED OR IMPLIED, BEYOND THE WARRANTY OF THE MANUFACTURER. For all warranty returns, request a return authorization (as detailed above), including a detailed description of the warranty issue. If the warranty return is beyond 60 days, the return can only be issued as in-store credit or an exchange. eBay does not allow us to issue a refund beyond 60 days.

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