Mahle S42097.030 Single Piston Ring Set +.030 for 08-10 Ford 6.4L Powerstroke

Vehicle Fitment

• 2008-2010 Ford F-250 Super Duty (6.4L Power Stroke V8, VIN R)
• 2008-2010 Ford F-350 Super Duty (6.4L Power Stroke V8, VIN R)
• 2008-2010 Ford F-450 Super Duty (6.4L Power Stroke V8, VIN R)
• 2008-2010 Ford F-550 Super Duty (6.4L Power Stroke V8, VIN R)
• Navistar MaxxForce 7 -- verify piston/bore spec before ordering

Fitment Notes

• +.030 in. (+0.76mm) oversize -- fits bores machined to +.030 in.
• Single cylinder set -- covers one piston; order 8 sets for a complete engine build
• Matches Mahle piston 2243851075MM (piston only) and 224-3851WR-0.75MM (piston with rings)
• Verify bore size before ordering -- do not use on standard bore engines
• Professional engine builder installation required
• Measure ring gaps before final assembly

Features

• Plasma-moly top compression ring -- fast seating, reduced friction
• Chrome-faced second compression ring -- superior wear resistance
• Steel-backed oil control ring -- efficient oil management
• Pre-lapped -- reduced break-in time
• CNC-controlled gap chamfer -- optimized compression, reduced blow-by
• Reduced ring mass -- lower friction and improved fuel efficiency
• OE quality -- meets or exceeds factory specifications
• 2-year / 200,000-mile Mahle warranty

Specifications

• Part Number: S42097.030
• Also referenced as: 42097.03 / 42097-030
• Oversize: +.030 in. (+0.76mm)
• Bore Diameter: 3.896 in. (at +.030 in. oversize)
• Top Ring Material: Carbon steel, plasma-moly faced
• Second Ring Material: Ductile iron, chrome faced
• Oil Ring Material: Cast iron, steel-backed
• Quantity: Single cylinder set (1 piston)
• UPC: 027067850836

Included Components

• 1x Top compression ring (plasma-moly)
• 1x Second compression ring (chrome)
• 1x Oil control ring assembly (3-piece)

Product Description

The Mahle S42097.030 is a single-cylinder +.030 in. oversize piston ring set for the 2008-2010 Ford 6.4L Power Stroke diesel engine (VIN R) and select Navistar MaxxForce 7 applications. This is the correct matching ring set for the Mahle 2243851075MM (+0.75mm) oversize piston. The plasma-moly top ring seats rapidly and reduces friction throughout the ring's service life, while the chrome-faced second ring provides superior wear resistance in the high-temperature, high-pressure environment of the 6.4L diesel combustion chamber.

Sold as a single-cylinder set -- order 8 sets for a complete engine build. Block must be bored and honed to +.030 in. before installation. Measure all ring gaps before final assembly. Backed by Mahle's 2-year / 200,000-mile warranty.