What is the compression ratio with these pistons?

These pistons feature an 11cc dish volume, which results in a 13.8:1 compression ratio when used with the appropriate cylinder heads and crankshaft stroke.

Are these pistons suitable for a turbo or supercharger build?

The forged 2618 aluminum construction and the 13.8:1 compression ratio make these pistons well-suited for high-performance naturally aspirated builds. For forced induction applications, careful tuning and potentially lower compression pistons might be considered depending on boost levels.

Can these pistons be shipped to California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle Forged Piston Set 4.04in Bore 11cc Dish 930208140

Name: Mahle MS Piston Set SBC 384ci 4.04in Bore 3.75in Stroke 6.0in Rod .927 Pin 11cc 13.8 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbc-384ci-4-04in-bore-3-75in-stroke-6-0in-rod-927-pin--t14-29532
Price: 864.35 USD
Availability: BackOrder

Mahle MS Piston Set SBC 384ci 4.04in Bore 3.75in Stroke 6.0in Rod .927 Pin 11cc 13.8 CR Set of 8

$864.35

On Backorder

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

Mahle forged piston set for SBC 384ci engines. 4.04in bore, 11cc dish, 13.8 CR. Not CARB approved.

Key Features

This is a set of 8 forged pistons from Mahle.
Designed for Chevrolet Small Block engines with a 384 cubic inch displacement.
Features a 4.04-inch bore and a 3.75-inch stroke.
Utilizes a 6.0-inch connecting rod length and a .927-inch pin diameter.
The 11cc dish volume results in a 13.8:1 compression ratio.
Constructed from 2618 aluminum for strength and durability.

⚠️ 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

Mahle is a well-known name in engine components, often supplying parts for original equipment manufacturers. This expertise translates into their aftermarket performance parts, like this Mahle MS Piston Set designed for Small Block Chevrolet 384 cubic inch engines. If you're building a high-performance engine and need pistons that can handle the stress, this set is a solid option.

These pistons are forged from 2618 aluminum, a strong material commonly used in performance applications because it can withstand higher temperatures and pressures compared to cast aluminum. This set features a 4.04-inch bore and a 3.75-inch stroke, with a 6.0-inch connecting rod length and a .927-inch pin diameter. The 11cc dish volume contributes to a 13.8:1 compression ratio, making these pistons suitable for naturally aspirated or forced induction builds where maximum power is the goal. The pistons weigh 474 grams, which is a notable weight for a forged piston of this size, indicating a robust construction.

This set includes eight pistons, enough for a complete V8 engine. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.