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Early Pontiac GTO

Pontiac

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
6112-4150 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98 6112-4150 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
433 Pontiac Early and Late, FX, Comp Height: 1.585, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.625, Approx Comp Ratio: 62cc-12.39, 87cc-9.62, 124cc-7.35 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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6112-4125 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98 6112-4125 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
428 Pontiac Early and Late, FX, Comp Height: 1.585, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.625, Approx Comp Ratio: 62cc-12.29, 87cc-9.53, 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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6112-4120 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98 6112-4120 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
427 Pontiac Early and Late, FX, Comp Height: 1.585, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.625, Approx Comp Ratio: 62cc-12.26, 87cc-9.51, 124cc-7.26 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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6112-4094 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.094 inch bore Pin Dia.: 0.98 6112-4094 421 Pontiac Early and Late FX Series -7cc Flat Top Pontiac Early and Late Forged Piston Set 4.094 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
421 Pontiac Early and Late, FX, Comp Height: 1.585, -7cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.625, Approx Comp Ratio: 62cc-12.1, 87cc-9.41, 124cc-7.18 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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6104-4190 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98 6104-4190 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
414 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.97, 87cc-8.71, 124cc-6.77 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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6104-4190 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98 6104-4190 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
414 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.97, 87cc-8.71, 124cc-6.77 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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6104-4180 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98 6104-4180 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
412 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.92, 87cc-8.68, 124cc-6.74 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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6104-4180 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98 6104-4180 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
412 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.92, 87cc-8.68, 124cc-6.74 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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6104-4160 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98 6104-4160 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
408 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.85, 87cc-8.6, 124cc-6.69 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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6104-4160 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98 6104-4160 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
408 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.85, 87cc-8.6, 124cc-6.69 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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6104-4150 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98 6104-4150 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
406 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.8, 87cc-8.57, 124cc-6.66 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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6104-4150 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98 6104-4150 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
406 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.8, 87cc-8.57, 124cc-6.66 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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6104-4125 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98 6104-4125 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
401 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.7, 87cc-8.48, 124cc-6.59 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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6104-4125 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98 6104-4125 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.125 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
401 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.7, 87cc-8.48, 124cc-6.59 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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6104-4120 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98 6104-4120 400 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
400 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.67, 87cc-8.46, 124cc-6.59 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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6104-4120 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98 6104-4120 389 Pontiac Early and Late FX Series -14cc Dish Top Pontiac Early and Late Forged Piston Set 4.120 inch bore Pin Dia.: 0.98
from $749.95
from $749.95
400 Pontiac Early and Late, FX, Comp Height: 1.71, -14cc Dish 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-10.67, 87cc-8.46, 124cc-6.59 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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