Engines and Components› Pistons and Piston Rings

CP Pistons

CP Piston BRS Big Block Chrysler 4.375 Bore 4.150 Stroke 6.760 Rod Set Of 8 (MTO Non-Cancel)

$1,068.90

SKU: C00A BM4021-055

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Description

Part #: BM4021-055

MIA's Description

These CP Pistons (BM4021-055) are designed for Big Block Chrysler engines. They are made from 2618 forgings and are available in flat tops and solid domes. Key features include .250 deep intake pockets, 1/16 ductile moly, 1/16 second ring, and 3/16 oil rings. They come with .990 x 2.750 pins with a .180 wall standard. The compression height with a 78cc head is 11.3:1.

Fitment

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Specifications

BrandCP Pistons
Part NumberC00A BM4021-055

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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