What is the compression ratio achieved with these pistons?

These pistons are designed to achieve a 12.1 compression ratio. This is calculated based on the piston dish volume (-8.8cc), bore size (4.270 inches), stroke (4.250 inches), and the assumed cylinder head volume.

What material are these pistons made from and why is it important?

The pistons are forged from 4032 aluminum. This material is chosen for its strength and its ability to handle thermal expansion well, making it a reliable choice for performance engine builds where temperatures can get high.

Are these pistons compatible with all Ford FE engines?

This set is specifically listed for Ford FE 487 cubic inch engines. While the FE family has variations, it's crucial to confirm that your specific engine's bore, stroke, and connecting rod dimensions align with the specifications of this piston set before purchase.

Mahle Forged Piston Set 4.27in Bore -9cc 12.1 CR 930266070

Name: Mahle MS Piston Set Ford 487ci 4.27in Bore 4.250in Stroke 6.7in Rod 0.990 Pin -9cc 12.1 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-ford-487ci-4-27in-bore-4-250in-stroke-6-7in-rod-0-990--t14-132021
Price: 843.49 USD
Availability: BackOrder

Mahle MS Piston Set Ford 487ci 4.27in Bore 4.250in Stroke 6.7in Rod 0.990 Pin -9cc 12.1 CR Set of 8

$843.49

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 Ford FE 487ci engines. 4.27in bore, 12.1 CR, -9cc dish. Set of 8.

Key Features

Fits Ford FE 487 cu in engines.
Forged from 4032 aluminum for strength and thermal properties.
Features a 4.270-inch bore and a -8.8cc dish volume.
Achieves a 12.1 compression ratio with compatible components.
Designed for a 4.250-inch stroke and 6.700-inch connecting rod.
Includes a 0.990-inch wrist pin diameter.

This piston set is designed for Ford FE 487 cubic inch engines. Please verify compatibility with your specific engine configuration.

⚠️ 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, especially for their piston technology. This set of forged pistons is built for Ford FE engines displacing 487 cubic inches, designed for builders looking for a specific compression ratio and bore size. These pistons feature a 4.270-inch bore and a -8.8cc dish volume, which helps achieve a 12.1 compression ratio when paired with the correct cylinder heads and crankshaft. The 4.250-inch stroke and 6.700-inch connecting rod length are also key dimensions for this build.

Constructed from 4032 aluminum, these pistons are a solid choice for performance builds. This material offers a good balance of strength and thermal expansion properties, making it suitable for demanding applications. Each piston weighs approximately 506 grams, contributing to a well-balanced rotating assembly. The 0.990-inch wrist pin diameter is standard for many performance connecting rods. This set includes eight pistons, enough for a complete V8 engine rebuild.

When planning your engine build, remember that these pistons are not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified mechanic to ensure these pistons are the right fit for your specific engine combination and performance goals. Proper installation and balancing are crucial for the longevity and performance of any engine build.