Speed-Pro Hypereutectic Pistons H661CP30 Pistons, Hypereutectic, Flat, 4.280 in. Bore, Chevy, GMC, Set of 8
Speed-Pro Hypereutectic Pistons H661CP30 Pistons, Hypereutectic, Flat, 4.280 in. Bore, Chevy, GMC, Set of 8
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!
Piston - Hypereutectic - 4.280 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 14:27:18
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 | slpH661CP30 |
| SFX Item ID | 5028099 |
| Accounting SKU | slp-H661CP30 |
| Manufacturer SKU | H661CP30 |
| Manufacturer UPC | 087674961660 |
| Alternative References | SEAH661CP30, SLP-H661CP30 |
Pistons, Hypereutectic, Flat, 4.280 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 | |
|---|---|
| Brand | Sealed Power |
| Manufacturer's Part Number | H661CP30 |
| Part Type | Pistons |
| Product Line | Speed-Pro Hypereutectic Pistons |
| UPC | 087674961660 |
| Piston Rings Included | No |
| Bore (in.) | 4.280 in. |
| Bore (mm) | 108.712mm |
| Stroke | 4.000 in. |
| Engine Stroke Type | Stock |
| Rod Length | 6.135 in. |
| Piston Style | Flat top, with two valve reliefs |
| Piston Material | Hypereutectic aluminum |
| Compression Height (in.) | 1.625 in. |
| Piston Head Volume (cc) | +2.00cc |
| Wrist Pin Style | Press-fit |
| Wrist Pin Retainers Included | No |
| Wrist Pin Included | Yes |
| Pin Diameter (in.) | 0.989 in. |
| Piston Ring Thickness | 5/64 in. x 5/64 in. x 3/16 in. |
| File Fit | No |
| Gapless | No |
| Remanufactured | No |
| Quantity | Sold as a set of 8. |
| Notes | DurOshield® coated piston skirt. |
Compatibility
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