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Speed-Pro Hypereutectic Pistons H661CP40 Pistons, Hypereutectic, Flat, 4.290 in. Bore, Chevy, GMC, Set of 8

SKU: SLPH661CP40

Pistons

Speed-Pro Hypereutectic Pistons H661CP40 Pistons, Hypereutectic, Flat, 4.290 in. Bore, Chevy, GMC, Set of 8

SKU: SLPH661CP40

Pistons
A$726.48
IN STOCK! Est Ship 4-7 days. In stock at 2 locations (more than 10 available)

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Description

Exclusive Sealed Power flash sale discount at StreetFX!

Talk about timing! This is a limited offer while stocks last on various Sealed Power part numbers. There's never been a better time to buy your Sealed Power upgrades, so what are you waiting for?!

This item is currently on sale!

Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.

Piston - Hypereutectic - 4.290 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 2.00 cc - Coated Skirt - Big Block Chevy - Set of 8


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 14:27:25

Data: v4.2 - Upd: 2026-11-09 03:24:18

Features

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

(keyword: pistons)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Sealed Power
StreetFX SKU slpH661CP40
SFX Item ID 5029337
Accounting SKU slp-H661CP40
Manufacturer SKU H661CP40
Manufacturer UPC 087674961677
Alternative References SEAH661CP40, SLP-H661CP40

Pistons, Hypereutectic, Flat, 4.290 in. Bore, Chevy, GMC, Set of 8

If you're looking for pistons with an unbeatable combination of performance and value, then Speed-Pro hypereutectic pistons are for you. These pistons are manufactured from aluminum alloy that contains 16 percent silicon for greater strength and wear resistance. They're also molded in the latest permanent-mold technology to ensure the precise fit and tight bore clearances that today's top engine builders demand. Hypereutectic pistons are ideal for use in high performance street, bracket, and oval track racing—and will work perfectly with normal ring end gaps. Choose the model designed for your vehicle and engine application.

Product Attributes
BrandSealed Power
Manufacturer's Part NumberH661CP40
Part TypePistons
Product LineSpeed-Pro Hypereutectic Pistons
UPC087674961677
Piston Rings IncludedNo
Bore (in.)4.290 in.
Bore (mm)108.966mm
Stroke4.000 in.
Engine Stroke TypeStock
Rod Length6.135 in.
Piston StyleFlat top, with two valve reliefs
Piston MaterialHypereutectic aluminum
Compression Height (in.)1.625 in.
Piston Head Volume (cc)+2.00cc
Wrist Pin StylePress-fit
Wrist Pin Retainers IncludedNo
Wrist Pin IncludedYes
Pin Diameter (in.)0.989 in.
Piston Ring Thickness5/64 in. x 5/64 in. x 3/16 in.
File FitNo
GaplessNo
RemanufacturedNo
QuantitySold as a set of 8.
NotesDurOshield® coated piston skirt.

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