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Olds 442

Small Block Oldsmobile

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STEP 1: Choose Cyl Bore Size Show all STEP 1: Choose Cyl Bore Size
STEP 2: Piston Series Show all STEP 2: Piston Series
STEP 3: Connecting Rod Length Show all STEP 3: Connecting Rod Length
STEP 4: Piston Pin Diameter Show all STEP 4: Piston Pin Diameter
STEP 6: Top - Comp. Ratio Show all STEP 6: Top - Comp. Ratio
Compression Height Show all Compression Height
Crankshaft Stroke Show all Crankshaft Stroke
6020-4000 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.000 inch bore Pin Dia.: 0.98 6020-4000 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.000 inch bore Pin Dia.: 0.98
from $749.95
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400 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-10.73, 68cc-10.29, 70cc-10.07 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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6020-4030 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.030 inch bore Pin Dia.: 0.98 6020-4030 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.030 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
406 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-10.85, 68cc-10.42, 70cc-10.21 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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6020-4040 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.040 inch bore Pin Dia.: 0.98 6020-4040 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.040 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
408 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-10.9, 68cc-10.46, 70cc-10.24 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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6020-4060 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.060 inch bore Pin Dia.: 0.98 6020-4060 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.060 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
412 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-10.98, 68cc-10.54, 70cc-10.33 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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6020-4125 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.125 inch bore Pin Dia.: 0.98 6020-4125 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.125 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
425 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-11.28, 68cc-10.8, 70cc-10.59 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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6020-4155 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.155 inch bore Pin Dia.: 0.98 6020-4155 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.155 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
431 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-11.4, 68cc-10.94, 70cc-10.71 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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6020-4165 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.165 inch bore Pin Dia.: 0.98 6020-4165 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.165 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
433 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-11.45, 68cc-10.97, 70cc-10.75 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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6020-4185 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.185 inch bore Pin Dia.: 0.98 6020-4185 400 Small Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.185 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
437 Small Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.975", ROD: 7, Approx Comp Ratio: 64cc-11.53, 68cc-11.06, 70cc-10.84 Effective June 15th 2026, These Oldsmobile ring grooves have been updated to the new specifications of 1.2-1.2-3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1/16-1/16-3/16.
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