Pistons - 4.040 in. Bore (in.) - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Wiseco Pro Tru Street Pistons PTS503A4

Wiseco Pro Tru Street Pistons PTS503A4

Pistons, Pro Tru Street Pistons, 4.040 in. Bore, Forged, Flat Top, 1/16 in., 1/16 in., 3/16 in. Rings, Chevrolet, Kit

Part Number: WIS-PTS503A4

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KB Performance Pistons KB319.040

Pistons, Hypereutectic, Dish, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring Grooves, Ford, Set of 8

Part Number: UEM-KB319-040

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

D.S.S. SX-Series Forged Pistons 1920-4040

Pistons, SX-Series, Forged, 5.00cc Flat, 4.040 in. Bore, Chevy LS, Set of 8

Part Number: DMS-1920-4040

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

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Estimated Ship Date: Dec 4, 2025 if ordered today

Speed-Pro Forged Pistons L2379F40

Pistons, Forged, Flat, 4.040 in. Bore, Ford, Cleveland, Set of 8

Part Number: SLP-L2379F40

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Summit Racing™ Forged Pro Pistons SUM-SBC383040L

Forged Pro pistons for 383 Stroker Chevy Long Rod, 4.040 bore, 1.125 C.H., 3.75 in. stroke, 6 in. rod, 9cc reverse dome 10.5@64cc, 10.1@67cc, 9.7@72cc

Part Number: SUM-SBC383040L

5.0 out of 5 stars ( 1 )

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D.S.S. FX-Series Forged 2618 Alloy Pistons 2-3166-4040

Piston Set, 347 Stroker SBF 289 - 302 2-FX Series +6cc Dome Top inline Piston Set. 4.040 bore

Part Number: DMS-2-3166-4040

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

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Estimated Ship Date: Dec 4, 2025 if ordered today

ICON Premium Forged Pistons IC978.040

Pistons, Premium Forged, Flat Top, 4.040 in. Bore, Chevy, Small Block, Set of 8

Part Number: UEM-IC978-040

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D.S.S. E Series Forged Piston and Ring Kits K8723-4040

Piston Set, 289 / 302 / 5.0 SBF 289 - 302 E Series -13cc Dish Top Inline Piston Set. 4.040 bore

Part Number: DMS-K8723-4040

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

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Estimated Ship Date: Dec 4, 2025 if ordered today

KB Performance Claimer Pistons 9906HC.040

Pistons, Hypereutectic, Flat, 4.040 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring Grooves, Chevy, Set of 8

Part Number: UEM-9906HC-040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 23, 2025 if ordered today

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Estimated Ship Date: Dec 23, 2025 if ordered today

D.S.S. E Series Forged Pistons 8720-4040

Pistons, Forged, Flat, 4.040 in. Bore, 302 Ford, Set of 8

Part Number: DMS-8720-4040

Not Yet Reviewed

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ICON Premium Forged Piston and Ring Kits IC729KTD.040

Piston and Ring Kit, Forged, Flat, 4.040 in. Bore, Ford, Small Block, Kit

Part Number: UEM-IC729KTD-040

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Mahle PowerPak Piston and Ring Kits 930244140

Piston and Ring Kit, Forged, 4.040 in. Bore, Ford, Kit

Part Number: MLE-930244140

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

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Estimated Ship Date: Dec 4, 2025 if ordered today

KB Performance Hyper Piston and Ring Kits KB349KTD.040

Piston and Ring Kit, Hypereutectic, Flat, 4.040 in. Bore, Ford, Small Block, Kit

Part Number: UEM-KB349KTD-040

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JE Pistons Pistons 139633

Pistons, Forged, Dish, 2-Valve Reliefs, 4.040 in. Bore, 3.480 in. Stroke, 5.700 in. Rod, 1.560 in. Compression, Chevy, Set of 8

Part Number: JEP-139633

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

D.S.S. E Series Forged Pistons 8715-4040

Pistons, E-Series, Forged, Flat, 4.040 in. Bore, Chevy, Set of 8

Part Number: DMS-8715-4040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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D.S.S. SX-Series Forged Pistons 8125-4040

Piston, SX-Series, Forged, Dish Top, 4.040 in. Bore, Chevy, Set of 8

Part Number: DMS-8125-4040

Not Yet Reviewed

Estimated Ship Date: Dec 4, 2025 if ordered today

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Estimated Ship Date: Dec 4, 2025 if ordered today

Summit Racing™ Forged Pro Pistons SUM-SBC327040

Forged Pro pistons for SB Chevy 327, 4.040 bore, 1.671 C.H., 3.25 in. stroke, 5.7 in. rod, 0cc net vol. dome. 11:1@58cc, 10.2@64cc, 9.8@67cc, 9.3@72cc

Part Number: SUM-SBC327040

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Speed-Pro Hypereutectic Pistons WH860CP40

Piston, Hypereutectic, Flat, 4.040 in. Bore, 3.75 in. Stroke, 5/64 in., 5/64 in., 3/16 in. Rings, Chevy, Each

Part Number: SLP-WH860CP40

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Summit Racing™ Forged Pro Pistons SUM-SBC302040

Forged Pro pistons for SB Chevy 302, 4.040 bore, 1.800 C.H., 3 in. stroke, 5.7 in. rod, 5cc dome 11:1@58cc, 10.2:1@64cc, 9.8:1@67cc, 9.3:1@72cc.

Part Number: SUM-SBC302040

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Speed-Pro Forged Pistons L2166AF40

Pistons, Forged, Dome with Two Valve Reliefs, 4.040 in. Bore, Chevy, Small Block, Set of 8

Part Number: SLP-L2166AF40

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Summit Racing™ Pro LS Forged Pistons SUM-3269454040-2

Pro LS 2618 Forged Piston, 4.040 bore, 1.326 C.H., 2cc Flat, Std. Stroke, .945 pin Press or Float, NA/Boost/Nitrous, Cathedral/Rect. 6.0L LQ4 LQ9

Part Number: SUM-3269454040-2

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KB Performance Hyper Piston and Ring Kits KB149KTD.040

Piston and Ring Kit, Hypereutectic, Dome, 4.040 in. Bore, Ford, Cleveland, Kit

Part Number: UEM-KB149KTD-040

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

KB Performance Hyper Piston and Ring Kits KB107KTM.040

Piston and Ring Kit, Hypereutectic, Flat, 4.040 in. Bore, Mopar, Small Block, Kit

Part Number: UEM-KB107KTM-040

Not Yet Reviewed

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KB Performance Hyper Piston and Ring Kits KB157KTM.040

Piston and Ring Kit, Hypereutectic, Dome, 4.040 in. Bore, Chevy, Small Block, Kit

Part Number: UEM-KB157KTM-040

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

KB Performance Hyper Piston and Ring Kits KB197KTM.040

Piston and Ring Kit, Hypereutectic, Dish, 4.040 in. Bore, Chevy, Small Block, Kit

Part Number: UEM-KB197KTM-040

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today