What is the compression ratio with these pistons?

With a typical 64cc cylinder head, these pistons will result in a compression ratio of approximately 9.0:1. This is due to the -26.0cc dish volume on each piston.

What material are these pistons made from?

These Mahle pistons are constructed from 2618 aluminum. This material is chosen for its strength and ability to withstand high temperatures and pressures common in performance engines.

Can these pistons be shipped to California?

No, this piston set is not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle MS Piston Set SBC 382ci 4.030in Bore 3.750in Stroke 5.

Name: Mahle MS Piston Set SBC 382ci 4.030in Bore 3.750in Stroke 5.7in Rod 0.927 Pin -26cc 8.9 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbc-382ci-4-030in-bore-3-750in-stroke-5-7in-rod-0-927--t14-29412
Price: 860.80 USD
Availability: BackOrder

Mahle MS Piston Set SBC 382ci 4.030in Bore 3.750in Stroke 5.7in Rod 0.927 Pin -26cc 8.9 CR Set of 8

$860.80

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Mahle MS Piston Set for SBC 382ci engines. Features 4.030in bore, 3.750in stroke, 5.7in rod, 0.927in pin, -26cc dish, 8.9 CR. Set of 8.

Key Features

This product is a set of 8 Mahle MS pistons.
Designed for Chevrolet Small Block 383 cu in engines.
Features a 4.030 inch bore size.
Accommodates a 3.750 inch stroke.
Compatible with 5.700 inch connecting rods.
Includes 0.927 inch wrist pins.

This piston set is designed for Chevrolet Small Block 383 cu in engines. It is not CARB approved and cannot be shipped to California.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

This Mahle MS Piston Set includes eight pistons designed for a Chevrolet Small Block 383 cubic inch engine. These pistons are built to handle the demands of a performance-oriented engine build, featuring a 4.030-inch bore and a 3.750-inch stroke. The set is configured for a 5.700-inch connecting rod and includes 0.927-inch wrist pins.

Each piston in this set has a -26.0cc volume dish, which contributes to a compression ratio of approximately 9.0:1 when used with a typical 64cc cylinder head. This specific compression ratio is well-suited for naturally aspirated street performance applications, offering a good balance of power and pump gas compatibility. The pistons are constructed from 2618 aluminum, a material known for its strength and durability under high temperatures and pressures, making them a solid choice for rebuilding or upgrading your engine's rotating assembly. Each piston weighs in at 488 grams.

Please note that this piston set is not CARB approved and cannot be shipped to California. It is important to consult your engine builder or a qualified mechanic to ensure these pistons are the correct choice for your specific build and to obtain detailed installation instructions.