- Engines & Components
- Piston Rings
- UEM Pistons KB Performance Piston Rings
Keith Black Performance Pistons are a very well known source in the high performance world and produce high quality products. The KB Piston Ring sets they offer to you are a great OE like ring set made of ductile iron. The compression rings are offered in Moly, Chrome, And Plasma Moly for added strength. These KB Piston Rings will seal engines of high compression or even down to a more mild compression engine. The rings also feature standard ring end gaps for a simple installation.
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4.000" Bore
Piston Ring Set4.000 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit
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$50.05
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set4.005 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit
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$50.05
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Piston Ring Set4.020 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$50.05
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set4.030 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$50.05
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Piston Ring Set4.060 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit
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$50.05
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set 4.020 Bore 1/16", 1/16", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit Sold as a Set
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$100.10
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set4.030 Bore 1/16", 1/16", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$100.10
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set4.060 Bore 1/16", 1/16", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$100.10
Estimated to ship direct from manufacturer in 24hrs
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United Engine Machine 4000BD8.065
United Engine Machine Piston Ring Set 4.065 in. Bore, File Fit, 1/16 in. 1/16 in. 3/16 in. Plasma Moly Ring Set [8 cyl.]
Plasma Moly Piston Ring Set4.065 in. Bore File Fit 1/16 in. 1/16 in. 3/16 in. Piston Grooves Ductile Iron w/Plasma Moly Coated Top Ring Set of 8
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$100.10
Estimated to ship direct from manufacturer in 24hrs
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4.125" Bore
Piston Ring Set4.125 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$69.30
Estimated to ship direct from manufacturer on 07/22/26, pending manufacturer availability.
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Piston Ring Set4.155 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit
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$69.30
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set4.185 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit
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$69.30
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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4.150" Bore
Piston Ring Set 4.150 Bore 5/64", 5/64", Iron Moly 3/16" Stainless Steel Oil Ring Non File Fit Sold as a Set
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$103.95
Estimated to ship direct from manufacturer on 07/27/26, pending manufacturer availability.
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4.250" Bore
United Engine Machine 4250AM8.005
United Engine Machine Piston Ring Set 4.250 Bore +.005 Oversize [8 Cylinder Set]
Piston Ring Set 4.250 Bore +.005 Oversize 5/64", 5/64", Cast Iron w/ Plasma Moly 3/16" Stainless Steel Oil Ring File Fit 8 Cylinder Set
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$65.45
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set4.250 Bore +.005 Oversize 1/16", 1/16", Iron Ductile 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$103.95
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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Piston Ring Set4.250 Bore +.035 Oversize 1/16", 1/16", Iron Ductile 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$103.95
Estimated to ship direct from manufacturer on 07/24/26, pending manufacturer availability.
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United Engine Machine 4250BD8.040
United Engine Machine Piston Ring Set 4.290 in. Bore +.040 Oversize
Piston Ring Set4.290 in. Bore (+.040 Oversize) 1/16 in., 1/16 in., Iron Ductile 3/16 in. Stainless Steel Oil Ring Non File Fit Sold As A Set
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$103.95
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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4.360" Bore
Piston Ring Set4.420 Bore 1/16", 1/16", Ductile Iron 3/16" Stainless Steel Oil Ring Non File Fit Sold As A Set
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$115.50
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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