• Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.275 C/H – 4.310 Bore – 4.250 Stroke – 25.00CC – #86069

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (400+HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.310
    Stroke: 4.250
    Rod Length: 6.385
    Compression Height: 1.275
    Compression Ratio (109.00): 11.40
    Compression Ratio (118.00): 10.50
    Compression Ratio (124.00): 10.00
    Dome Volume: 25.00
    Dome Height: .235
    Gram Weight: 587
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: ORS-425
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .360
    Second Land: .185
    Oil Land: .085
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: (1) Heavy NOS Forging Design (2) Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.275 C/H – 4.320 Bore – 4.250 Stroke – 24.70CC – #86070

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (400+HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.320
    Stroke: 4.250
    Rod Length: 6.385
    Compression Height: 1.275
    Compression Ratio (109.00): 11.40
    Compression Ratio (118.00): 10.50
    Compression Ratio (124.00): 10.00
    Dome Volume: 24.70
    Dome Height: .225
    Gram Weight: 589
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: ORS-431
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .360
    Second Land: .185
    Oil Land: .085
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: (1) Heavy NOS Forging Design (2) Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.275 C/H – 4.500 Bore – 4.250 Stroke – 16.60CC – #86071

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (400+HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.500
    Stroke: 4.250
    Rod Length: 6.385
    Compression Height: 1.275
    Compression Ratio (109.00): 11.40
    Compression Ratio (118.00): 10.50
    Compression Ratio (124.00): 10.00
    Dome Volume: 16.60
    Dome Height: .145
    Gram Weight: 636
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: ORS-447
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .350
    Second Land: .185
    Oil Land: .085
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: (1) Heavy NOS Forging Design (2) Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.275 C/H – 4.530 Bore – 4.250 Stroke – 15.30CC – #86072

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (400+HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.530
    Stroke: 4.250
    Rod Length: 6.385
    Compression Height: 1.275
    Compression Ratio (109.00): 11.30
    Compression Ratio (118.00): 10.50
    Compression Ratio (124.00): 10.00
    Dome Volume: 15.30
    Dome Height: .135
    Gram Weight: 647
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: ORS-447
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .350
    Second Land: .185
    Oil Land: .085
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: (1) Heavy NOS Forging Design (2) Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.648 C/H – 4.280 Bore – 4.000 Stroke – 22.50CC – #83069

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.280
    Stroke: 4.000
    Rod Length: 6.135
    Compression Height: 1.648
    Compression Ratio (109.00): 10.40
    Compression Ratio (118.00): 9.60
    Compression Ratio (124.00): 9.10
    Dome Volume: 22.50
    Dome Height: .225
    Gram Weight: 678
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: Not Included
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .350
    Second Land: .157
    Oil Land: .078
    Deck Thickness: .250
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.648 C/H – 4.280 Bore – 4.000 Stroke – 38.70CC – #83063

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.280
    Stroke: 4.000
    Rod Length: 6.135
    Compression Height: 1.648
    Compression Ratio (109.00): 12.10
    Compression Ratio (118.00): 11.00
    Compression Ratio (124.00): 10.40
    Dome Volume: 38.70
    Dome Height: .500
    Gram Weight: 607
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: Not Included
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .330
    Second Land: .157
    Oil Land: .078
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.648 C/H – 4.310 Bore – 4.000 Stroke – 21.20CC – #88767

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.310
    Stroke: 4.000
    Rod Length: 6.135
    Compression Height: 1.648
    Compression Ratio (109.00): 10.50
    Compression Ratio (118.00): 9.70
    Compression Ratio (124.00): 9.20
    Dome Volume: 21.20
    Dome Height: .225
    Gram Weight: 718
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: Not Included
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .350
    Second Land: .157
    Oil Land: .078
    Deck Thickness: .250
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.648 C/H – 4.310 Bore – 4.000 Stroke – 38.00CC – #86063

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.310
    Stroke: 4.000
    Rod Length: 6.135
    Compression Height: 1.648
    Compression Ratio (109.00): 12.20
    Compression Ratio (118.00): 11.10
    Compression Ratio (124.00): 10.60
    Dome Volume: 38.00
    Dome Height: .500
    Gram Weight: 603
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: Not Included
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .330
    Second Land: .157
    Oil Land: .078
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.648 C/H – 4.375 Bore – 4.000 Stroke – 36.00CC – #88065

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.375
    Stroke: 4.000
    Rod Length: 6.135
    Compression Height: 1.648
    Compression Ratio (109.00): 12.20
    Compression Ratio (118.00): 11.20
    Compression Ratio (124.00): 10.60
    Dome Volume: 36.00
    Dome Height: .530
    Gram Weight: 725
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: Not Included
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .230
    Second Land: .134
    Oil Land: .078
    Deck Thickness: .230
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.768 C/H – 4.280 Bore – 3.760 Stroke – 51.00CC – #83762

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.280
    Stroke: 3.760
    Rod Length: 6.135
    Compression Height: 1.768
    Compression Ratio (109.00): 12.30
    Compression Ratio (118.00): 12.00
    Compression Ratio (124.00): 11.20
    Dome Volume: 51.00
    Dome Height: .700
    Gram Weight: 648
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: Not Included
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .330
    Second Land: .157
    Oil Land: .078
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

  • Chevrolet Big Block: Low Dome – Open Chamber – Moderate Compression – Dome Top: 1.768 C/H – 4.310 Bore – 3.760 Stroke – 51.00CC – #86762

    Whats Included: Complete Set Of Pistons, Locks, & Pins
    Application: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Not Recommended For Turbo Applications
    [Please Note]: Image is a representation of this item. Actual item may vary.

    Piston Top Type: Dome Top
    Bore: 4.310
    Stroke: 3.760
    Rod Length: 6.135
    Compression Height: 1.768
    Compression Ratio (109.00): 13.50
    Compression Ratio (118.00): 12.00
    Compression Ratio (124.00): 11.20
    Dome Volume: 51.00
    Dome Height: .700
    Gram Weight: 661
    Rings: 1/16 1/16 3/16
    Ring Set: CR9190
    Rings Included: No
    Oil Rail Spacer: Not Included
    Pin Type: 5115 Straight Wall
    Pin Diameter: .990
    Pin Length: 2.930
    Pin Wall: 150
    Pin Weight: 146 Grams
    Pin Buttons: N/A
    Block Height: 9.800
    Top Land: .330
    Second Land: .157
    Oil Land: .078
    Deck Thickness: .200
    Intake Cutter: 2.400
    Exhaust Cutter: Slant
    Intake Depth: .320
    Exhaust Depth: .120 up
    Note: Compression Ratio based on .050 piston to head clearance (deck & gasket combined)
    Details

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625 S Douglas St. El Segundo, CA 90245

Phone: 1 (310) 536-0100

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Family Run Since 1979…

For roughly 4 decades now, Ross Racing Pistons has met the global racer demand, for the most advanced forged pistons in the racing industry. Along with a dedicated line of in-stock pistons, we specialize in the manufacturing of custom, high-end, forged aluminum Import and Domestic piston applications, for use in high horsepower motorsports.
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