What is the compression ratio achieved with these pistons?

These Mahle MS pistons are designed to achieve a 9.5:1 compression ratio. This is calculated with a 10.6cc dish volume and the specified engine dimensions.

Are these pistons suitable for all Porsche 356 models?

These pistons are designed for the Porsche 356 with specific bore, stroke, and rod dimensions. It is crucial to verify these specifications against your engine's requirements before purchase.

What does 'Not CARB approved' mean for this product?

This means the pistons do not meet the emissions standards set by the California Air Resources Board (CARB). As a result, they cannot be legally shipped to or installed on vehicles registered in California.

Mahle MS Piston Set Porsche 356 91.0mm Bore PP91-001N

Name: Mahle MS Piston Set Porsche 356 91.0mm Bore 74mm Stroke 135.95mm Rod 22mm Pin 10.6cc 9.5CR Set of 4
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-porsche-356-91-0mm-bore-74mm-stroke-135-95mm-rod-22mm--t14-224460
Price: 1352.08 USD
Availability: BackOrder

Mahle MS Piston Set Porsche 356 91.0mm Bore 74mm Stroke 135.95mm Rod 22mm Pin 10.6cc 9.5CR Set of 4

$1352.08

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 Set for Porsche 356. 91.0mm bore, 9.5:1 CR. Set of 4.

Key Features

Set of 4 Mahle MS pistons for Porsche 356.
Features a 91.0mm bore and 10.6cc dish volume.
Designed for a 74mm stroke and 135.95mm connecting rod.
Includes a 22mm wrist pin.
Achieves a 9.5:1 compression ratio.
Forged construction for strength and durability.

This piston set is specifically designed for the Porsche 356. Always consult manufacturer specifications to confirm 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, often supplying parts for original equipment manufacturers. This MS Piston Set is built for the Porsche 356, offering a way to rebuild or upgrade your engine's core. These pistons are designed to work with a 91.0mm bore, a 74mm stroke, and a 135.95mm connecting rod, featuring a 22mm wrist pin. They are crafted to achieve a 9.5:1 compression ratio with a 10.6cc dish volume.

This set includes four pistons, ready for installation in your Porsche 356 engine. The forged construction means these pistons are strong and can handle the demands of performance driving or a full engine rebuild. The specific dimensions, including the 91.0mm bore and the 22mm pin size, are critical for proper fitment and function within the engine's cylinder and connecting rod assembly. Achieving a 9.5:1 compression ratio is a common target for performance builds, balancing power with reliability.

When undertaking an engine rebuild for your Porsche 356, using well-made components like these Mahle pistons is important for long-term performance. It's essential to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitting and assembly procedures to ensure optimal engine operation.