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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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6020-4165 425 Big Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.165 inch bore Pin Dia.: 0.98 6020-4165 425 Big 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 Big 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: 72cc-10.55, 75cc-10.25, 77cc-10.05 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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6020-4185 425 Big Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.185 inch bore Pin Dia.: 0.98 6020-4185 425 Big 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 Big 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: 72cc-10.62, 75cc-10.32, 77cc-10.13 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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6025-4057 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.057 inch bore Pin Dia.: 0.98 6025-4057 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.057 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
350 Small Block Oldsmobile, FX, Comp Height: 1.625, -5cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.385", ROD: 6, Approx Comp Ratio: 64cc-10.25, 68cc-9.8, 70cc-9.6 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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6025-4080 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.080 inch bore Pin Dia.: 0.98 6025-4080 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.080 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
354 Small Block Oldsmobile, FX, Comp Height: 1.625, -5cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.385", ROD: 6, Approx Comp Ratio: 64cc-10.36, 68cc-9.89, 70cc-9.68 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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6025-4100 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.100 inch bore Pin Dia.: 0.98 6025-4100 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.100 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
358 Small Block Oldsmobile, FX, Comp Height: 1.625, -5cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.385", ROD: 6, Approx Comp Ratio: 64cc-10.44, 68cc-9.99, 70cc-9.77 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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6025-4125 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.125 inch bore Pin Dia.: 0.98 6025-4125 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.125 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
362 Small Block Oldsmobile, FX, Comp Height: 1.625, -5cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.385", ROD: 6, Approx Comp Ratio: 64cc-10.55, 68cc-10.07, 70cc-9.86 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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6025-4155 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.155 inch bore Pin Dia.: 0.98 6025-4155 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.155 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
367 Small Block Oldsmobile, FX, Comp Height: 1.625, -5cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.385", ROD: 6, Approx Comp Ratio: 64cc-10.66, 68cc-10.180, 70cc-9.96 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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6025-4165 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.165 inch bore Pin Dia.: 0.98 6025-4165 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.165 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
369 Small Block Oldsmobile, FX, Comp Height: 1.625, -5cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.385", ROD: 6, Approx Comp Ratio: 64cc-10.69, 68cc-10.220, 70cc-10.01 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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6025-4185 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.185 inch bore Pin Dia.: 0.98 6025-4185 350 Small Block Oldsmobile FX Series -5cc Flat Top Oldsmobile Forged Piston Set 4.185 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
373 Small Block Oldsmobile, FX, Comp Height: 1.625, -5cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.385", ROD: 6, Approx Comp Ratio: 64cc-10.8, 68cc-10.320, 70cc-10.09 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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6100-4080 389 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.080 inch bore Pin Dia.: 0.98 6100-4080 389 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.080 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
392 Pontiac Late , FX, Comp Height: 1.71, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.750", ROD: 6.625, Approx Comp Ratio: 62cc-11.36, 87cc-8.83, 124cc-6.75 Effective June 15th 2026, These Pontiac 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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6100-4080 400 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.080 inch bore Pin Dia.: 0.98 6100-4080 400 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.080 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
392 Pontiac Late , FX, Comp Height: 1.71, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.750", ROD: 6.625, Approx Comp Ratio: 62cc-11.36, 87cc-8.83, 124cc-6.75 Effective June 15th 2026, These Pontiac 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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6100-4100 389 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.100 inch bore Pin Dia.: 0.98 6100-4100 389 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.100 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
396 Pontiac Late , FX, Comp Height: 1.71, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.750", ROD: 6.625, Approx Comp Ratio: 62cc-11.44, 87cc-8.91, 124cc-6.81 Effective June 15th 2026, These Pontiac 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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6100-4100 400 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.100 inch bore Pin Dia.: 0.98 6100-4100 400 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.100 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
396 Pontiac Late , FX, Comp Height: 1.71, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.750", ROD: 6.625, Approx Comp Ratio: 62cc-11.44, 87cc-8.91, 124cc-6.81 Effective June 15th 2026, These Pontiac 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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6100-4120 389 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98 6100-4120 389 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
400 Pontiac Late , FX, Comp Height: 1.71, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.750", ROD: 6.625, Approx Comp Ratio: 62cc-11.55, 87cc-8.97, 124cc-6.86 Effective June 15th 2026, These Pontiac 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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