What is the compression ratio achieved with these pistons?

These pistons have a -5.8cc dish volume. When paired with appropriate cylinder heads and gasket thickness, they are designed to achieve a 10.5:1 compression ratio for your LS7 engine build.

What material are these pistons made from and why is it important?

The pistons are forged from 4032 aluminum. This material is chosen for its superior strength and heat resistance compared to cast aluminum, making it well-suited for high-performance applications that generate significant heat and pressure.

Are these pistons legal for use in California?

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

Mahle LS7 Forged Piston Set 4.185in Bore 930227805

Name: Mahle MS Piston Set LS7 365ci 4.185in Bore 4.005in Stroke 3.622in Rod .6.12in Pin -5.8cc
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-ls7-365ci-4-185in-bore-4-005in-stroke-3-622in-rod-6-12-t14-541646
Price: 820.08 USD
Availability: BackOrder

Mahle MS Piston Set LS7 365ci 4.185in Bore 4.005in Stroke 3.622in Rod .6.12in Pin -5.8cc

$820.08

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 LS7 365ci 4.185in Bore 4.005in Stroke 3.622in Rod .6.12in Pin -5.8ccEngine Piston Set

Key Features

Fits Chevrolet LS 365 cu in engines.
Forged from 4032 aluminum for strength and durability.
Features a 4.185-inch bore size.
Designed for a 4.005-inch stroke and 3.622-inch rod length.
Includes a 0.927-inch pin diameter.
Has a -5.8cc dish volume for a 10.5:1 compression ratio.

This piston set is designed for Chevrolet LS 365 cu in engines. Please verify 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

If you're building a high-performance LS7 engine, getting the right pistons is crucial for reliability and power. This Mahle MS Piston Set is designed for the LS7 platform, specifically for 365 cubic inch displacements, and features a 4.185-inch bore. Mahle is a well-known name in engine components, and these pistons are built with their experience in mind to handle the demands of a performance build.

These pistons are forged from 4032 aluminum, a material chosen for its strength and ability to withstand higher temperatures and pressures compared to cast pistons. This makes them a solid choice for engines that will see hard use, whether on the street or the track. The set includes pistons with a 4.005-inch stroke, a 3.622-inch rod length, and a 0.927-inch pin diameter. They have a -5.8cc dish volume, which helps achieve a 10.5:1 compression ratio with the appropriate cylinder heads and gasket combination. Each piston weighs in at 428 grams, contributing to a balanced rotating assembly.

When installing these pistons, ensure you follow the manufacturer's recommended clearances and assembly procedures. Because these are performance pistons, they are not CARB approved and cannot be shipped to California. This set is a key component for anyone looking to rebuild or significantly upgrade their LS7 engine.