What material are these Mahle pistons made from?

These Mahle pistons are forged from 4032 aluminum. This material is known for its strength and good thermal expansion characteristics, making it well-suited for high-performance engine builds.

What is the intended compression ratio with these pistons?

With the specified components, these pistons are designed to achieve a compression ratio of 10.1:1. This is influenced by the piston's dish volume and other engine build parameters.

Are these pistons compatible with all Oldsmobile Big Block engines?

This piston set is specifically designed for Oldsmobile Big Block engines with a 495 cubic inch displacement. It's important to verify your engine's specifications to ensure proper fitment.

Mahle Forged Piston Set 4.185in Bore 930274585

Name: Mahle MS Piston Sets 495c.i. 4.185bore 4.5stroke 7.1rod 1.26c/h 0.990pin -22ccvol 504g 10.1c/r 4032
Brand: Mahle
SKU: mahle-mahle-ms-piston-sets-495c-i-4-185bore-4-5stroke-7-1rod-1-26c-h-0-990pin-22-t14-29081
Price: 904.14 USD
Availability: BackOrder

Mahle MS Piston Sets 495c.i. 4.185bore 4.5stroke 7.1rod 1.26c/h 0.990pin -22ccvol 504g 10.1c/r 4032

$904.14

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 Sets 495c.i. 4.185bore 4.5stroke 7.1rod 1.26c/h 0.990pin -22ccvol 504g 10.1c/r 4032Engine Piston Set

Key Features

Fits Oldsmobile Big Block 495 cu in. engines.
Forged from 4032 aluminum for strength and thermal stability.
4.185 inch bore and 4.500 inch stroke configuration.
Features a -22.0cc dish volume for a 10.1:1 compression ratio.
Includes 0.990 inch wrist pins.
Compression height is 1.260 inches.

This piston set is designed for Oldsmobile Big Block 495 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

Mahle is well-known for its high-performance engine components, and this forged piston set is a prime example of their commitment to quality for serious engine builds. If you're working on a stroker Big Block Oldsmobile 455, this set is designed to handle the demands of increased displacement and power.

These pistons are forged from 4032 aluminum, a material chosen for its strength and thermal expansion properties, making it suitable for high-performance applications where reliability is key. The set is configured for a 495 cubic inch displacement, featuring a 4.185-inch bore and a 4.500-inch stroke, which works with a 7.100-inch connecting rod. The dish volume is -22.0cc, contributing to a compression ratio of 10.1:1 with the specified components. The pin diameter is 0.990 inches, and the compression height is 1.260 inches. Each piston weighs approximately 503 grams, indicating a well-built component designed for durability.

When rebuilding or stroking your Big Block Oldsmobile, using a piston set like this from Mahle ensures you're starting with a solid foundation. Keep in mind 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.