What material are these Mahle pistons made from?

These Mahle pistons are forged from 4032 aluminum. This material is known for its strength and favorable thermal expansion characteristics, making it suitable for high-performance engine applications.

What is the intended compression ratio and what components are needed to achieve it?

The pistons are designed to achieve an 11.7:1 compression ratio. This is calculated with an -8.1cc dish volume and will depend on the specific cylinder head volume and head gasket thickness used in your engine build.

Are these pistons legal for use in California?

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

Mahle Forged Piston Set 511ci 4.375in Bore 929962575

Name: Mahle MS Piston Set BBM 511ci 4.375in Bore 4.25in Stroke 7.1in Rod 0.990 Pin -8cc 11.7 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-bbm-511ci-4-375in-bore-4-25in-stroke-7-1in-rod-0-990-p-t14-191488
Price: 886.31 USD
Availability: BackOrder

Mahle MS Piston Set BBM 511ci 4.375in Bore 4.25in Stroke 7.1in Rod 0.990 Pin -8cc 11.7 CR Set of 8

$886.31

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 Chrysler Big Block 511 cu in. Features 4.375in bore and 11.7 CR.

Key Features

Fits Chrysler Big Block 511 cu in. engines.
Set of 8 forged pistons constructed from 4032 aluminum.
Features a 4.375-inch bore and 4.250-inch stroke.
Achieves an 11.7:1 compression ratio with an -8.1cc dish volume.
Designed for a 7.100-inch connecting rod and a 0.990-inch wrist pin.
Each piston weighs approximately 530 grams.

This piston set is designed for Chrysler Big Block 511 cu in. engines. Please verify compatibility with your specific engine build.

⚠️ 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, recognized for their expertise in piston technology. This Mahle MS Piston Set is built for high-performance applications, specifically designed for Chrysler Big Block engines displacing 511 cubic inches. If you're rebuilding or upgrading a serious performance engine, these pistons are engineered to handle the demands of increased power and stress.

This set includes eight forged pistons, each featuring a 4.375-inch bore and a 4.250-inch stroke. The pistons are constructed from 4032 aluminum, a material chosen for its strength and thermal expansion properties, which helps maintain consistent piston-to-wall clearance under high temperatures. With a compression ratio of 11.7:1 and a dish volume of -8.1cc, these pistons are intended for use with specific cylinder head volumes to achieve optimal performance. The 7.100-inch rod length and 0.990-inch pin diameter are key dimensions that ensure proper fitment within the engine assembly. Each piston weighs approximately 530 grams, contributing to a balanced rotating assembly.

It's important to note that these pistons are not CARB approved and cannot be shipped to California. Additionally, they carry a Prop 65 warning. For a successful installation, ensure you consult the manufacturer's specifications for compatible cylinder heads, crankshafts, connecting rods, and any necessary machining or assembly procedures. This set is a solid option for builders looking for robust, performance-oriented pistons for their Chrysler Big Block build.