What is the compression ratio achieved with these pistons?

These Mahle MS pistons are designed to achieve a 10.1:1 compression ratio. This is calculated based on the 98mm bore, 35.8cc dish volume, and the intended stroke and rod combination.

What is included in this piston set?

This set includes six Mahle MS pistons, which is the complete quantity needed for a six-cylinder Porsche 911 Carrera engine rebuild. It does not include rings or connecting rods.

Are these pistons suitable for use in California?

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

Mahle 911 Carrera Piston Set 98mm Bore PP98-013

Name: Mahle MS Piston Set 84-89 Por 911 Carrera 98mm Bore 74.4 Stk 127mm Rod 23mm Pin 35.8cc 10.1CR Set 6
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-84-89-por-911-carrera-98mm-bore-74-4-stk-127mm-rod-23m-t14-224487
Price: 2058.33 USD
Availability: BackOrder

Mahle MS Piston Set 84-89 Por 911 Carrera 98mm Bore 74.4 Stk 127mm Rod 23mm Pin 35.8cc 10.1CR Set 6

$2058.33

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 1984-1989 Porsche 911 Carrera. 98mm bore, 10.1:1 CR.

Key Features

Fits 1984-1989 Porsche 911 Carrera.
Mahle MS Piston Set includes six pistons.
Features a 98mm bore size.
Designed for a 74.4mm stroke crankshaft and 127mm connecting rod.
Utilizes a 23mm wrist pin.
Piston dish volume is 35.8cc.

This piston set is designed for the 1984-1989 Porsche 911 Carrera. Please verify compatibility with your specific vehicle's 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

This is a Mahle MS Piston Set specifically for the 1984-1989 Porsche 911 Carrera. These pistons are designed to replace your original equipment, bringing your engine's performance back to its intended specifications. If you're rebuilding the top end of your 911 Carrera, a well-built piston set like this is fundamental to ensuring proper compression and reliable operation.

Mahle is known for its robust engine components, and this piston set is no exception. They feature a 98mm bore and are designed to work with a 74.4mm stroke crankshaft and a 127mm connecting rod, utilizing a 23mm wrist pin. The dish volume is 35.8cc, which results in a 10.1:1 compression ratio when installed. This specific compression ratio is crucial for achieving optimal power and efficiency from the Carrera's flat-six engine. The pistons are made from a strong aluminum alloy, chosen for its balance of weight and durability under high engine temperatures and pressures. This set includes six pistons, enough for a complete engine rebuild.

When undertaking an engine rebuild of this caliber, it's important to ensure all components are within spec and installed correctly. Always refer to the manufacturer's detailed installation instructions and torque specifications to ensure a successful rebuild. Please note that this part is not CARB approved and cannot be shipped to California. It also carries a Prop 65 warning.