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Pontiac GTO

Pontiac Late

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
6125-4190 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98 6125-4190 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
464 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.68, 87cc-9.33, 124cc-7.29 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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6125-4190 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98 6125-4190 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
464 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.68, 87cc-9.33, 124cc-7.29 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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6125-4180 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98 6125-4180 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
462 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.64, 87cc-9.3, 124cc-7.27 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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6125-4180 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98 6125-4180 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
462 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.64, 87cc-9.3, 124cc-7.27 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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6125-4160 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98 6125-4160 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
458 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.54, 87cc-9.24, 124cc-7.22 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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6125-4160 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98 6125-4160 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
458 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.54, 87cc-9.24, 124cc-7.22 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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6125-4150 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98 6125-4150 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
456 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.52, 87cc-9.2, 124cc-7.19 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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6125-4150 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98 6125-4150 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
456 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.52, 87cc-9.2, 124cc-7.19 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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6125-4125 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98 6125-4125 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
450 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.38, 87cc-9.11, 124cc-7.11 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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6125-4125 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98 6125-4125 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
450 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.38, 87cc-9.11, 124cc-7.11 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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6125-4120 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98 6125-4120 455 Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
449 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.37, 87cc-9.09, 124cc-7.1 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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6125-4120 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98 6125-4120 400 - 4.210 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
449 Pontiac Late , FX, Comp Height: 1.48, -18cc Dish Top, PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-11.37, 87cc-9.09, 124cc-7.1 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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6120-4190 455 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98 6120-4190 455 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
464 Pontiac Late , FX, Comp Height: 1.48, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-13.18, 87cc-10.22, 124cc-7.78 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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6120-4190 400 - 4.210 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98 6120-4190 400 - 4.210 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
464 Pontiac Late , FX, Comp Height: 1.48, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-13.18, 87cc-10.22, 124cc-7.78 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.
Choose Options
6120-4180 455 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98 6120-4180 455 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
462 Pontiac Late , FX, Comp Height: 1.48, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-13.13, 87cc-10.2, 124cc-7.76 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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6120-4180 400 - 4.210 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98 6120-4180 400 - 4.210 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
462 Pontiac Late , FX, Comp Height: 1.48, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.210", ROD: 6.625, Approx Comp Ratio: 62cc-13.13, 87cc-10.2, 124cc-7.76 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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