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JE Pistons Pro Steel Piston Rings
Piston Rings, Plasma-moly, 3.900 in. Bore, 1.5mm, 1.5mm, 3.0mm Thickness, 8-Cylinder, Set
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Estimated Ship Date: Nov 12, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
J68008-3900-3
Part Type:
Product Line:
Summit Racing Part Number:
JEP-J6800839003
Item Number:
931969
UPC:
193564227881
Bore (in.):
3.900 in.
Bore (mm):
99.060mm
File Fit:
No
Gapless:
No
Gas Ported:
No
Top Ring Included:
Yes
Top Ring Thickness:
1.5mm
Top Ring Material:
Steel
Top Ring Facing Material:
Plasma-moly
Second Ring Included:
Yes
Second Ring Thickness:
1.5mm
Second Ring Material:
Iron
Second Ring Facing Material:
Phosphate coated
Oil Ring Included:
Yes
Oil Ring Thickness:
3.0mm
Oil Ring Tension:
Low
Oil Ring Material:
Carbon steel
Oil Ring Facing Material:
Chrome
Quantity:
Sold as 8 sets.
Notes:
Barrel face back cut torsional top ring, taper face D-wall reverse torsional second ring with full seal flex vent style oil ring.
JE Pistons Pro Steel Piston Rings
JE Pistons Pro Steel piston rings utilize a high-strength, alloy-steel top ring that provides superior bore conformity. This is complemented by the outstanding seal and wear characteristics of a high-velocity, plasma-moly inlay coating. The top ring weighs under 10 g as a result of reduced ring radials and short axial heights, helping to minimize cylinder wall drag. The optional second ring's Napier hook profile design helps to improve oil control and efficiency.
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