MAHLE S42097 PISTON RING SET (STANDARD) FOR 2008-2010 FORD SUPERDUTY WITH 6.4L POWERSTROKE ENGINE

The S42097 is a premium OE‑quality piston ring set designed for the 6.4 L Ford Powerstroke diesel engine. It includes rings for a single piston (top compression, second ring, oil ring assembly)

Specifications (Standard & Oversize Options)

• Types Available: Standard (S42097), or oversize in +0.010″, +0.020″, +0.030″ increments
  

• Materials & Coatings:

  • Top ring: carbon steel with plasma‑moly face

  • Second ring: ductile/cast iron

  • Oil ring: cast iron, 2‑piece oil ring assembly
    

• Thickness/Axial Heights:

  • Top ring: ~0.139–0.141″ (~2.5 mm)

  • Second ring: ~0.078″ (~2.0 mm)

  • Oil ring: ~0.118″ (~3.0 mm)
    

• Bore Size:

  • Standard: 3.866″

  • +0.020″ oversize: 3.885″
    

 Vehicle Fitment

Fully compatible with:

• 2008–2010 Ford F‑250, F‑350, F‑450, and F‑550 Super Duty trucks equipped with the 6.4 L Powerstroke diesel V8
  

Ordered as rings per piston/cylinder, so a complete engine rebuild requires ordering a quantity of 8.

 Highlights & Benefits

• Engineered to meet or exceed OE standards—pre‑lapped for immediate seating, minimizing break‑in time
  

• Made with low-friction, high-durability coatings and steels to reduce wear and oil consumption
  

• Backed by a 12‑month warranty and meets California Proposition 65 compliance
  

 Summary

The MAHLE S42097 piston rings are a tried-and‑true, technician‑favorite OE replacement for your 2008 – 2010 6.4 L Powerstroke. Whether you’re doing a standard rebuild or boring the block, there’s a precisely machined option ready:

• Standard size for stock bores

• Plus .010, .020, and .030” oversize sets for bored engines

Each set covers a single cylinder, so be sure to order eight for a full engine rebuild.