What is the compression ratio with these pistons?

These pistons have a -6.4cc volume and are designed to achieve an 11.6:1 compression ratio when used with appropriate cylinder heads and gasket combinations for your Pontiac Big Block stroker build.

Are these pistons suitable for daily driving or just performance builds?

These are forged pistons designed for high-performance stroker engines, capable of handling increased displacement and stress. They are not typically recommended for standard daily driving applications where a cast or hypereutectic piston might be more suitable.

What does 'Not CARB approved' mean for shipping?

This means the pistons do not meet California Air Resources Board emissions standards. Consequently, they cannot be legally shipped to California for installation on a vehicle registered in that state.

Mahle Forged Piston Set 4.185" Bore 930275185

Name: Mahle MS Piston Sets 495c.i. 4.185bore 4.500stroke 6.8rod 1.160c/h 0.990pin -6ccvol 518g 11.6c/r
Brand: Mahle
SKU: mahle-mahle-ms-piston-sets-495c-i-4-185bore-4-500stroke-6-8rod-1-160c-h-0-990pin-t14-29458
Price: 839.05 USD
Availability: BackOrder

Mahle MS Piston Sets 495c.i. 4.185bore 4.500stroke 6.8rod 1.160c/h 0.990pin -6ccvol 518g 11.6c/r

$839.05

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 Pontiac Big Block 495 cu in. 4.185" bore, 4.500" stroke. For stroker builds.

Key Features

Fits Pontiac Big Block 495 cu in. stroker engines.
Forged from 4032 aluminum for strength and durability.
4.185 inch bore size.
Designed for a 4.500 inch stroke and 6.800 inch connecting rod.
1.160 inch compression height.
Flat top piston with -6.4cc volume for 11.6:1 compression ratio.

This piston set is designed for Pontiac 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

If you're building a serious stroker engine for your Pontiac Big Block, you need pistons that can handle the increased displacement and stress. This Mahle MS Piston Set is designed specifically for that purpose, giving you the foundation for a powerful 495 cubic inch engine.

These pistons are forged from 4032 aluminum, a material known for its strength and ability to withstand high temperatures and pressures, making them a solid choice for stroker applications. They feature a 4.185-inch bore and are designed to work with a 4.500-inch stroke and a 6.800-inch connecting rod, resulting in a compression height of 1.160 inches. The flat top design with a -6.4cc volume contributes to an 11.6:1 compression ratio when paired with the right cylinder heads and gasket combination. Each piston weighs in at approximately 517 grams, a well-built component ready for performance.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper assembly and tuning to ensure optimal performance and longevity of your stroker build.