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.

The MAHLE S42097 Piston Ring Set is expertly crafted to enhance the performance of 2008-2010 Ford Super Duty trucks equipped with the robust 6.4L Powerstroke diesel engine. This premium, OE-quality set includes rings designed for one piston, comprising essential components such as the top compression ring, the second ring, and an oil ring assembly.

Constructed with meticulous attention to detail, the top compression ring features carbon steel with a plasma-moly face, ensuring superior durability and reduced wear. The second ring is made from ductile or cast iron, while the oil ring consists of a two-piece cast iron assembly, all of which help maintain optimal engine performance. The standard piston ring set is precisely engineered to fit a bore size of 3.866 inches, with additional oversize options available in increments of +0.010″, +0.020″, and +0.030″ for flexibility in engine rebuilds.

The thickness specifications are just as impressive, with the top ring measuring approximately 0.139–0.141 inches, the second ring at around 0.078 inches, and the oil ring at 0.118 inches. Designed for immediate seating, the pre-lapped condition minimizes break-in time, allowing for smoother operation right out of the box.

Each set is tailored specifically for individual cylinders, making it essential to order eight for a complete engine rebuild. With low-friction coatings that effectively reduce oil consumption and enhance engine life, the MAHLE S42097 ring set is not just a replacement; it’s an investment in your vehicle's longevity. Backed by a 12-month warranty and compliant with California Proposition 65, this piston ring set is the ideal choice for any serious technician or DIY enthusiast dedicated to maintaining the peak performance of their Ford Super Duty.