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Vehicle Info NeededMAHLE MOTORSPORTS PISTONSPART NUMBER: 644-S42170-020
Diesel Single Piston Ring Set Cummins B-Series
$3643
Ships on 09/14/2026
Lowest Price GuaranteeDiesel Piston Rings
- Diesel Single Piston Ring Set Cummins B-Series
- 3.9L/5.9L Cummins B-Series Engine
- 4.035" Bore
- Single Cylinder Set
Mahle Motorsports Pistons 644-S42170-020 Features:
Mahle pioneered the use of piston ring simulation & computer development to design rings that provide "free" HP by minimizing friction. Their ultra flat ring flanks maximize ring-to-piston sealing.
Features:
- Top Ring: Plasma moly-coated ductile iron (barrel shape)
- Second Ring: Cast iron (reverse twist)
- Oil Ring: Low or standard tension
- Complete sets except #644-3908MS15-1, #644-4035MS-15-1, and #644-4065MS-15-1
Part TypePiston Ring
Product LineMahle Performance Piston Rings
BrandMAHLE MOTORSPORTS PISTONS
Package Height1.1
Package Width5.1
Package Length5.1
Weight0.23 PG
Part CategoryPerformance Parts
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
