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Plasma-Moly Standard Tension Piston Ring Set with 4.045" Bore
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- Plasma-Moly Piston Ring Set
- 4.045" Bore (+.045")
- 1/16", 1/16", 3/16" Ring Widths
- File Fit
- Standard Tension
- Carbon Steel
Radial: - Top Ring Radial: .190"
- Second Ring Radial: .170"
- Oil Ring Radial: .201"
MAHLE Original plasma-moly steel top rings provide the ultimate in tensile strength, hardness, and fatigue resistance. The MAHLE Original SAE 9254 steel is combined with proprietary plasma face coating to extend life, eliminate ring breakage, reduce side wear and minimize groove pound out problems. The smaller cross-section of the steel ring allows the top ring groove to be moved closer to the top of the piston. This reduces the crevice volume portion around the top ring land for reduced unburned fuel. Smaller cross-sections mean lower ring mass; this lighter ring design will better tolerate inertial forces and thus seal against the bottom of the ring groove more effectively. The smaller cross-section permitted with higher strength material greatly improves the ability of the ring to conform to cylinder bore distortion often found in today's high output, high RPM engines.
Mahle Original performance piston rings sets are the most technically advanced and rigorously tested than any other piston ring manufacture. Current racing engines demand piston rings to operate at higher operating rpm, higher compression ratio, and higher temperatures from race to race and remain dependable. These factors require rings that are stronger, lighter, seals better, and resist wear under extreme conditions.
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Features:
- Recommended for street, racing, or marine applications
- Barrel faced top ring offers instant break-in and maintains contact with the cylinder wall as the piston rocks slightly at TDC and BDC.
- Napier THG (hook groove) second compression ring provides superior oil control by scraping cylinder walls of oil and providing a reservoir on each down stroke.
- CP-20 oil control ring, named by its 20 degree ear angle, and exclusive feature that provides the absolute best cylinder wall seal.
- Available in different compression ring materials consisting of cast iron, ductile iron, gas nitride stainless steel, steel alloy.
High Alloy Steel vs. Ductile Iron
Physical Advantages:
- Higher Tensile Strength
- Higher Yield Strength
- Greater Fatigue Resistance
- Greater Hardness
- Lower Ring Mass
Performance Benefits:
- Better Stress Resistance
- Reduced Groove Poundout
- Less Side Wear
- Superior Oil Economy
- Superior Blow-by Control
- Lower Friction
- Longer Service Lift
- Better Cylinder Wall Conformability
