What material are these Mahle pistons made from?

These Mahle pistons are made from their proprietary MS (Molybdenum-Sputtered) alloy. This material is chosen for its improved scuffing resistance and reduced friction, which can lead to less wear and better oil control over time.

What connecting rod and wrist pin size are these pistons designed for?

This piston set is designed to work with stock 127mm connecting rods and a 23mm wrist pin. It's important to verify these dimensions match your engine's components during a rebuild.

Are these pistons compatible with California emissions standards?

No, these pistons are not CARB approved and cannot be shipped to California. Please check local regulations if you are outside of California.

Mahle MS Piston Set 100mm 10.3CR BR 74.4 PP100-009N

Name: Mahle MS Piston Set 84-89 Por 911 3.2-3.5L 100mm BR 74.4 Stk 127mm Rod 23mm Pin 35cc 10.3CR Set of 6
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-84-89-por-911-3-2-3-5l-100mm-br-74-4-stk-127mm-rod-23m-t14-224477
Price: 2068.28 USD
Availability: BackOrder

Mahle MS Piston Set 84-89 Por 911 3.2-3.5L 100mm BR 74.4 Stk 127mm Rod 23mm Pin 35cc 10.3CR Set of 6

$2068.28

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 84-89 Porsche 911 3.2-3.5L. 100mm bore, 10.3:1 CR. Set of 6.

Key Features

Fits 1984-1989 Porsche 911 3.2-3.5L engines.
Features a 100mm bore size.
Achieves a 10.3:1 compression ratio with a 35cc dish volume.
Designed for stock 127mm connecting rods and 23mm wrist pins.
Constructed from Mahle's MS (Molybdenum-Sputtered) alloy for improved scuffing resistance and reduced friction.
Includes a set of six pistons for 6-cylinder engines.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Product Details

Mahle's MS Piston Set is built for Porsche 911 models from 1984-1989 with 3.2 to 3.5-liter engines. These pistons feature a 100mm bore and a 10.3:1 compression ratio, designed to work with stock 127mm connecting rods and a 23mm wrist pin. The 35cc dish volume is carefully calculated to achieve this specific compression ratio, making them a solid choice for engine rebuilds where performance and reliability are key.

Crafted from Mahle's proprietary MS (Molybdenum-Sputtered) alloy, these pistons offer improved scuffing resistance and reduced friction compared to standard cast or forged pistons. This advanced material choice means less wear over time and potentially better oil control, contributing to a healthier engine and longer service life. The 74.4mm stroke compatibility ensures these pistons are a direct fit for the specified engine configurations, simplifying the rebuild process. Each set includes six pistons, ready for installation in your 6-cylinder Porsche engine.

When rebuilding your engine, it's important to ensure all components are properly balanced and installed according to manufacturer specifications. This piston set is designed for a stock 127mm rod length and a 23mm wrist pin, so confirm these dimensions match your existing or replacement components. While these pistons are not CARB approved and cannot be shipped to California, they represent a well-built option for enthusiasts looking to restore or enhance their classic Porsche 911 engine.