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Early Pontiac GTO

Pontiac 4.500 Stroke

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
6157-4190 455 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99 6157-4190 455 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
496 Pontiac Late , FX, Comp Height: 1.16, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-11.69, 87cc-9.47, 124cc-7.47 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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6157-4190 400 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99 6157-4190 400 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
496 Pontiac Late , FX, Comp Height: 1.16, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-11.69, 87cc-9.47, 124cc-7.47 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
6157-4180 455 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99 6157-4180 455 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
494 Pontiac Late , FX, Comp Height: 1.16, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-11.65, 87cc-9.44, 124cc-7.45 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
6157-4180 400 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99 6157-4180 400 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
494 Pontiac Late , FX, Comp Height: 1.16, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-11.65, 87cc-9.44, 124cc-7.45 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
6157-4150 455 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99 6157-4150 455 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
487 Pontiac Late , FX, Comp Height: 1.16, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-11.51, 87cc-9.33, 124cc-7.36 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
6157-4150 400 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99 6157-4150 400 - 4.500 Stroke Pontiac Late FX Series -24cc Dish Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
487 Pontiac Late , FX, Comp Height: 1.16, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-11.51, 87cc-9.33, 124cc-7.36 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
6150-4190 455 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99 6150-4190 455 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
496 Pontiac Late , FX, Comp Height: 1.16, -7cc Flat Top , PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-14.03, 87cc-10.86, 124cc-8.25 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
6150-4190 400 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99 6150-4190 400 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.190 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
496 Pontiac Late , FX, Comp Height: 1.16, -7cc Flat Top , PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-14.03, 87cc-10.86, 124cc-8.25 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
6150-4180 455 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99 6150-4180 455 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
494 Pontiac Late , FX, Comp Height: 1.16, -7cc Flat Top , PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-13.97, 87cc-10.83, 124cc-8.23 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
6150-4180 400 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99 6150-4180 400 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
494 Pontiac Late , FX, Comp Height: 1.16, -7cc Flat Top , PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-13.97, 87cc-10.83, 124cc-8.23 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
6150-4150 455 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99 6150-4150 455 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
487 Pontiac Late , FX, Comp Height: 1.16, -7cc Flat Top , PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-13.82, 87cc-10.69, 124cc-8.14 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
6150-4150 400 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99 6150-4150 400 - 4.500 Stroke Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.150 inch bore Pin Dia.: 0.99
from $749.95
from $749.95
487 Pontiac Late , FX, Comp Height: 1.16, -7cc Flat Top , PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.500", ROD: 6.8, Approx Comp Ratio: 62cc-13.82, 87cc-10.69, 124cc-8.14 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