JE Pistons Ring Sets 1.5-1.5-3.0-3900 8CY - J68008-3900-3

JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various materials, and in multiple thicknesses to suit a wide variety of engines. JE Pistons also offers an array of custom piston ring services including back cutting, dyke cutting, lapping, grinding, and PVD coating. These services, the same used by top NHRA Pro Stock and NASCAR teams, are now available to the public and offer tremendous gains in durability, power through reduced friction, and improved ring seal.

Features & Benefits

• High strength alloy steel top ring provides superior bore conformity
• outstanding seal and wear characteristics of a high velocity plasma moly inlay coating
• top ring weighs under 10 grams
• reduced ring radials and short axial heights help minimize cylinder wall drag
• optional 2nd ring Napier hook profile design helps improve oil control and effeciency

Specifications: Piston Ring Set, 8 Cyl., File Fit, Each.

Detailed Specifications

• Bore Diameter: 3.900 in.
• File Fit: Yes
• Third Ring Facing Material: Carbon Steel
• Third Ring Material: Carbon Steel
• Third Ring Shape: Full Seal, Flex Vent
• Second Compression Ring Thickness: 0.0591 in.
• Top Compression Ring Thickness: 0.0591 in.
• Ring Set Thickness: 0.0591 in. Top x 0.0591 in. 2nd x 0.118 in. Oil
• Oil Ring Thickness: 0.118 in.
• Top Ring Radial Width: 0.145 in.
• Oil Ring Radial Width: 0.150 in.
• Second Ring Radial Width: 0.165 in.
• Top Ring Axial Height: 0.95 mm
• Second Ring Axial Height: 1.50 mm
• Ring Type: 3 Ring
• Oil Ring Axial Height: 3.00 mm
• Top Ring Shape: Barrel Face, Back Cut, Torsional
• Top Ring Material: Carbon Steel
• Second Ring Material: Iron
• Second Ring Facing Material: Phosphate
• Second Ring Shape: Taper Face, D-wall, Reverse Torsional