Pistons - 3.940 in. Bore (in.) - 6.123 in. Rod Length - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

KB Performance Hyper Piston and Ring Kits KB167KTM.030

Piston and Ring Kit, Hypereutectic, Flat, 3.940 in. Bore, Mopar, Small Block, Kit

Part Number: UEM-KB167KTM-030

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

KB Performance Hyper Piston and Ring Kits KB399KTM.030

Piston and Ring Kit, Hypereutectic, Dome, 3.940 in. Bore, Mopar, Small Block, Kit

Part Number: UEM-KB399KTM-030

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

KB Performance Pistons KB167.030

Pistons, Hypereutectic, Flat, 3.940 in. Bore, Chrysler, Dodge, Plymouth, Set of 8

Part Number: UEM-KB167-030

1.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

ICON Premium Forged Piston and Ring Kits IC846KTD.030

Piston and Ring Kit, Forged, Flat, 3.940 in. Bore, Mopar, Small Block, Kit

Part Number: UEM-IC846KTD-030

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

ICON Premium Forged Piston and Ring Kits IC847KTD.030

Piston and Ring Kit, Forged, Step Dish, 3.940 in. Bore, Mopar, Small Block, Kit

Part Number: UEM-IC847KTD-030

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

KB Performance Pistons KB399.030

Pistons, Hypereutectic, Dome, 3.940 in. Bore, Chrysler, Dodge, Plymouth, Set of 8

Part Number: UEM-KB399-030

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

D.S.S. FX-Series Forged 2618 Alloy Pistons 2-6310-3940

D.S.S. FX-Series Forged 2618 Alloy Pistons 2-6310-3940

Piston Set, 318 Mopar 2-FX Series -3cc Small Block Mopar Flat Top Piston Set. 3.940 bore

Part Number: DMS-2-6310-3940

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

D.S.S. FX-Series Forged 4032 Alloy Pistons 1-6310-3940

Piston Set, 318 Mopar 1-FX Series -3cc Small Block Mopar Flat Top Piston Set. 3.940 bore

Part Number: DMS-1-6310-3940

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

Enginetech Piston Sets P3004(8)030

Engine Piston Set 85-03 CHR/DOD/JEP/PLY 5.2L

Part Number: EGN-P30048030

Not Yet Reviewed

Estimated Ship Date: Apr 9, 2026 if ordered today

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Estimated Ship Date: Apr 9, 2026 if ordered today

Wiseco Professional Series Pistons 60145RA3940

Pistons, Professional Series, Forged Aluminum, Reverse Dome, 3.940 in. Bore, Stroked, Right Side, Chrysler, Dodge, Plymouth, Small Block, LA, Each

Part Number: WIS-60145RA3940

Not Yet Reviewed

Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

Wiseco Professional Series Pistons 60145LA3940

Pistons, Professional Series, Forged Aluminum, Reverse Dome, 3.940 in. Bore, Stroked, Left Side, Chrysler, Dodge, Plymouth, Small Block, LA, Each

Part Number: WIS-60145LA3940

Not Yet Reviewed

Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

Diamond Pistons Domestic Series Pistons 50001

MO MAG FT 3.940B/4.000S/6.123R/1.457CD

Part Number: DPP-50001

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Call to Order

D.S.S. FX-Series Forged 2618 Alloy Pistons with XR Wrist Pins 3-6310-3940

Piston Set, 318 Mopar 3-FX Series -3cc Small Block Mopar Flat Top Piston Set. 3.940 bore

Part Number: DMS-3-6310-3940

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

D.S.S. FX-Series Forged 4032 Alloy Piston and Ring Kits K1-6310-3940

Piston Set, 318 Mopar K1-FX Series -3cc Small Block Mopar Flat Top Piston Set. 3.940 bore

Part Number: DMS-K1-6310-3940

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

D.S.S. FX-Series Forged 2618 Alloy Piston and Ring Kits K2-6310-3940

Piston Set, 318 Mopar K2-FX Series -3cc Small Block Mopar Flat Top Piston Set. 3.940 bore

Part Number: DMS-K2-6310-3940

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

Enginetech Piston and Ring Kits K1516(8)030

Engine Piston Kit 67-84 CHR/DOD/PLY 5.2L

Part Number: EGN-K15168030

Not Yet Reviewed

Estimated Ship Date: Apr 9, 2026 if ordered today

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Estimated Ship Date: Apr 9, 2026 if ordered today

Enginetech Piston and Ring Kits K3004(8)030

Engine Piston Kit 85-03 CHR/DOD/JEP/PLY 5.2L

Part Number: EGN-K30048030

Not Yet Reviewed

Estimated Ship Date: Apr 9, 2026 if ordered today

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Estimated Ship Date: Apr 9, 2026 if ordered today

ICON Premium Forged Pistons IC846.030

Pistons, Forged, Flat, 3.940 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Mopar, Small Block, Set of 8

Part Number: UEM-IC846-030

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

D.S.S. FX-Series Forged 2618 Alloy Piston and Ring Kits with XR Wrist Pins K3-6310-3940

Piston Set, 318 Mopar K3-FX Series -3cc Small Block Mopar Flat Top Piston Set. 3.940 bore

Part Number: DMS-K3-6310-3940

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

Enginetech Piston Sets P1516(8)030

Engine Piston Set 67-84 CHR/DOD/PLY 5.2L

Part Number: EGN-P15168030

Not Yet Reviewed

Estimated Ship Date: Apr 9, 2026 if ordered today

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Estimated Ship Date: Apr 9, 2026 if ordered today

ICON Premium Forged Pistons IC847.030

Pistons, Forged, Dish, 3.940 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Mopar, Small Block, Set of 8

Part Number: UEM-IC847-030

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today