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Engines and Components› Pistons and Piston Rings

SEALED POWER

CAST PISTON

$943.92 $86.99 Save $856.93

SKU: S03T H661CP 30

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

This Sealed Power Hypereutectic Piston H661CP30 is a flat-top piston set with a 4.280-inch bore, 1.625-inch compression height, and 5/64 x 5/64 x 3/16-inch ring grooves. It features a coated skirt and a -2.00 cc piston head volume, designed for Big Block Chevy 454 engines.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSEALED POWER
Part NumberS03T H661CP 30

Videos

Forged vs Cast Piston Strength!

Forged vs Cast Piston Strength!
Cast vs Hypereutectic vs Forged Pistons | Whats the Difference?

Cast vs Hypereutectic vs Forged Pistons | Whats the Difference?
Can We Make 600HP from a Junkyard BIG BLOCK CHEVY on the CHEAP?!

Can We Make 600HP from a Junkyard BIG BLOCK CHEVY on the CHEAP?!
454 Big Block Chevy is BUILT! - Assembly and Specs

454 Big Block Chevy is BUILT! - Assembly and Specs
Budget Big Block Build: Chevy 454 (7.4L) teardown

Budget Big Block Build: Chevy 454 (7.4L) teardown

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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