What is the compression ratio achieved with these pistons?

These Mahle MS pistons are designed to achieve a 9.9:1 compression ratio when used with a 3.622-inch stroke and compatible cylinder heads and gaskets. The -5.8cc valve reliefs are factored into this calculation.

What material are these pistons made from?

The pistons are forged from 2618 aluminum. This material is chosen for its high strength and ability to withstand the heat and pressure generated in performance engine applications.

Are these pistons compatible with all LS engines?

This set is specifically designed for GM LSX 365 cubic inch engines with a 4.005-inch bore. It is crucial to confirm your engine's specifications, including bore size and stroke, before purchasing to ensure proper fitment.

Mahle GM LSX Piston Set 4.005" Bore 930227005

Name: Mahle MS Piston Set GM LSX 365cid 4.005x1.330CH 3.622 Stk 6.098 Rod .945 Pin -5.8cc 9.9CR - Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-365cid-4-005x1-330ch-3-622-stk-6-098-rod-945-pi-t14-348841
Price: 899.45 USD
Availability: InStock

Mahle MS Piston Set GM LSX 365cid 4.005x1.330CH 3.622 Stk 6.098 Rod .945 Pin -5.8cc 9.9CR - Set of 8

$899.45

Only 1 left in stock

Mahle MS Piston Set for GM LSX 365cid engines. 4.005" bore, 9.9 CR. Set of 8.

Key Features

Fits GM LSX 365 cu in engines.
Forged from 2618 aluminum for strength and durability.
Features a 4.005-inch bore and 1.330-inch compression height.
Includes -5.8cc valve reliefs for camshaft clearance.
Designed for a 9.9:1 compression ratio with a 3.622-inch stroke.
Utilizes a 0.945-inch wrist pin.

This piston set is designed for Chevrolet LS engines with a 365 cubic inch displacement. Please verify compatibility with your specific 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

Mahle's MS Piston Set is built for GM LSX 365 cubic inch engines, featuring a 4.005-inch bore and a 1.330-inch compression height. These pistons are forged from 2618 aluminum, a material known for its strength and ability to handle high temperatures and pressures, making them a solid choice for performance builds. The -5.8cc valve reliefs are designed to provide ample clearance for larger camshafts, ensuring compatibility with updated valvetrain setups. Each piston weighs in at 442 grams, contributing to a well-balanced rotating assembly.

This set is engineered to achieve a 9.9:1 compression ratio with a 3.622-inch stroke and a 6.098-inch connecting rod, paired with a 0.945-inch wrist pin. The Mahle MS pistons are a popular choice for engine builders looking to upgrade their LSX engine's internal components. Their well-made construction and precise specifications aim to improve engine performance and reliability under demanding conditions. This set includes eight pistons, enough for a complete V8 engine rebuild.

When rebuilding your engine, consider the specific requirements of your build. These pistons are designed for a 4.005-inch bore and require appropriate machining to ensure a perfect fit. Due to their performance-oriented design and compression ratio, it's important to ensure your chosen cylinder heads and camshaft are compatible to achieve optimal results. Please note that this product is not CARB approved and cannot be shipped to California.