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Mopar Challenge R/T

Mopar

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 5: Cylinder Head Type Show all STEP 5: Cylinder Head Type
STEP 6: Top - Comp. Ratio Show all STEP 6: Top - Comp. Ratio
Compression Height Show all Compression Height
Crankshaft Stroke Show all Crankshaft Stroke
6403-4030 410 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984 6403-4030 410 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
408 Small Block Mopar, FX, Comp Height: 1.457, -18cc Dish Top, PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.123, Approx Comp Ratio: 62cc-10.46, 64cc-10.26, 72cc-9.5 Effective June 15th 2026, These Sm These Block Mopar 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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6403-4000 410 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984 6403-4000 410 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
402 Small Block Mopar, FX, Comp Height: 1.457, -18cc Dish Top, PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.123, Approx Comp Ratio: 62cc-10.34, 64cc-10.12, 72cc-9.39 Effective June 15th 2026, These Sm These Block Mopar 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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6400-4060 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.060 inch bore Pin Dia.: 0.984 6400-4060 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.060 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
414 Small Block Mopar, FX, Comp Height: 1.457, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.123, Approx Comp Ratio: 62cc-12.55, 64cc-12.23, 72cc-11.17 Effective June 15th 2026, These Sm These Block Mopar 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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6400-4040 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.040 inch bore Pin Dia.: 0.984 6400-4040 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.040 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
410 Small Block Mopar, FX, Comp Height: 1.457, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.123, Approx Comp Ratio: 62cc-12.44, 64cc-12.14, 72cc-11.07 Effective June 15th 2026, These Sm These Block Mopar 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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6400-4030 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984 6400-4030 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
408 Small Block Mopar, FX, Comp Height: 1.457, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.123, Approx Comp Ratio: 62cc-12.38, 64cc-12.09, 72cc-11.02 Effective June 15th 2026, These Sm These Block Mopar 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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6400-4000 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984 6400-4000 410 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
402 Small Block Mopar, FX, Comp Height: 1.457, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.000", ROD: 6.123, Approx Comp Ratio: 62cc-12.24, 64cc-11.95, 72cc-10.89 Effective June 15th 2026, These Sm These Block Mopar 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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6353-4060 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.060 inch bore Pin Dia.: 0.984 6353-4060 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.060 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
371 Small Block Mopar, FX, Comp Height: 1.667, -18cc Dish Top, PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-9.59, 64cc-9.4, 72cc-8.72 Effective June 15th 2026, These Sm These Block Mopar 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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6353-4030 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984 6353-4030 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
365 Small Block Mopar, FX, Comp Height: 1.667, -18cc Dish Top, PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-9.46, 64cc-9.28, 72cc-8.6 Effective June 15th 2026, These Sm These Block Mopar 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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6353-4040 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.040 inch bore Pin Dia.: 0.984 6353-4040 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.040 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
367 Small Block Mopar, FX, Comp Height: 1.667, -18cc Dish Top, PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-9.51, 64cc-9.31, 72cc-8.65 Effective June 15th 2026, These Sm These Block Mopar 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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6353-4000 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984 6353-4000 360 Small Block Mopar FX Series -18cc Dish Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
360 Small Block Mopar, FX, Comp Height: 1.667, -18cc Dish Top, PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-9.36, 64cc-9.17, 72cc-8.51 Effective June 15th 2026, These Sm These Block Mopar 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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6350-4060 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.060 inch bore Pin Dia.: 0.984 6350-4060 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.060 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
371 Small Block Mopar, FX, Comp Height: 1.667, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-11.35, 64cc-11.06, 72cc-10.11 Effective June 15th 2026, These Sm These Block Mopar 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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6350-4040 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.040 inch bore Pin Dia.: 0.984 6350-4040 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.040 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
367 Small Block Mopar, FX, Comp Height: 1.667, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-11.24, 64cc-10.97, 72cc-10.01 Effective June 15th 2026, These Sm These Block Mopar 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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6350-4030 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984 6350-4030 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.030 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
365 Small Block Mopar, FX, Comp Height: 1.667, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-11.18, 64cc-10.92, 72cc-9.96 Effective June 15th 2026, These Sm These Block Mopar 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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6350-4000 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984 6350-4000 360 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 4.000 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
360 Small Block Mopar, FX, Comp Height: 1.667, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.580", ROD: 6.123, Approx Comp Ratio: 62cc-11.07, 64cc-10.8, 72cc-9.86 Effective June 15th 2026, These Sm These Block Mopar 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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6310-3970 318 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 3.970 inch bore Pin Dia.: 0.984 6310-3970 318 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 3.970 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
328 Small Block Mopar, FX, Comp Height: 1.802, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.310", ROD: 6.123, Approx Comp Ratio: 62cc-10.19, 64cc-9.95, 72cc-9.09 Effective June 15th 2026, These Sm These Block Mopar 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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6310-3950 318 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 3.950 inch bore Pin Dia.: 0.984 6310-3950 318 Small Block Mopar FX Series -3cc Flat Top Small Block Mopar Forged Piston Set 3.950 inch bore Pin Dia.: 0.984
from $749.95
from $749.95
324 Small Block Mopar, FX, Comp Height: 1.802, -3cc Flat Top , PIN: .984", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.310", ROD: 6.123, Approx Comp Ratio: 62cc-10.08, 64cc-9.84, 72cc-8.99 Effective June 15th 2026, These Sm These Block Mopar 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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