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You are here: Home > Piston Rings > Probe Piston Rings > Pre-Fit


Traditionally, pre-gapped replacement ring-sets are “sized” for the nominal bore size of the engine, usually with generous end gap clearances to minimize the potential of butting the end gaps. These are perfect of the novice engine builder or for a lower performance build where ring end gaps are not critical.
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Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Moly Ring Set - 3.898 - 1.2 1.2 3.0 - Pre Fit

P/N: 1411-20000
  • Stainless Steel Moly Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 3.898 Base Bore
  • 8 Cylinder Set
Available Bore Sizes: 3.898, 3.905
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Moly Ring Set - 3.917 - 1.2 1.2 3.0 - Pre Fit

P/N: 1411-20001
  • Stainless Steel Moly Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 3.917 Base Bore
  • Pre Fit
  • 8 Cylinder Set
Available Bore Sizes: 3.917, 3.927, 3.937
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Moly Ring Set - 4.000 - 1.2 1.2 3.0 - Pre Fit

P/N: 1411-20002
  • Stainless Steel Moly Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 4.000 Base Bore
  • Pre Fit
  • 8 Cylinder Set
Available Bore Sizes: 4.000, 4.010, 4.020, 4.030, 4.040, 4.050, 4.060, 4.070, 4.080, 4.100, 4.120
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Moly Ring Set - 4.125 - 1.2 1.2 3.0 - Pre Fit

P/N: 1411-20003
  • Stainless Steel Moly Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 4.125 Base Bore
  • 8 Cylinder Set
Available Bore Sizes: 4.125, 4.135, 4.155, 4.165, 4.185
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Ring Set - 3.780 - 1.5 1.5 3.0 - Pre Fit

P/N: 1413-10000
  • Stainless Steel Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 3.780 Base Bore
  • Pre Fit
  • 8 Cylinder Set
Available Bore Sizes: 3.780
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Ring Set - 3.898 - 1.2 1.5 3.0 - Pre Fit

P/N: 1412-30000
  • Stainless Steel Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 3.898 Base Bore
  • 8 Cylinder Set
Available Bore Sizes: 3.898, 3.905
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Ring Set - 3.898 - 1.5 1.5 3.0 - Pre Fit

P/N: 1413-10001
  • Stainless Steel Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 3.898 Base Bore
  • Pre Fit
  • 8 Cylinder Set
Available Bore Sizes: 3.898, 3.905
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Ring Set - 3.917 - 1.2 1.5 3.0 - Pre Fit

P/N: 1412-30001
  • Stainless Steel Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 3.917 Base Bore
  • Pre Fit
  • 8 Cylinder Set
Available Bore Sizes: 3.917, 3.927, 3.937
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Ring Set - 3.917 - 1.5 1.5 3.0 - Pre Fit

P/N: 1413-10002
  • Stainless Steel Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 3.917 Base Bore
  • Pre Fit
  • 8 Cylinder Set
Available Bore Sizes: 3.917, 3.927, 3.937
Probe Piston Rings
Probe Gas-Nitrided Stainless Steel Ring Set - 4.000 - 1.2 1.2 3.0 - Pre Fit

P/N: 1412-30002
  • Stainless Steel Top Ring (Nitrided)
  • Napier Second Ring (Martensitic)
  • Standard Tension Oil (Flex-Vent)
  • 4.000 Base Bore
  • +.005 File Fit
  • 8 Cylinder Set
Available Bore Sizes: 4.000, 4.030, 4.040, 4.060, 4.070, 4.080, 4.100, 4.120