What is the compression ratio with these pistons?

These Mahle pistons are designed to achieve a 10.2:1 compression ratio when used with a 4.000 inch stroke crankshaft and a 6.125 inch connecting rod. This is a notable increase over stock configurations.

What material are these pistons made from?

The pistons are forged from 2618 aluminum. This material is chosen for its strength and ability to handle the high temperatures and pressures found in performance engine builds.

Are these pistons legal for use in California?

No, these Mahle pistons are not CARB approved and cannot be shipped to California. It is important to check local emissions regulations before purchasing.

Mahle GM LSX 415cid Forged Piston Set 930229465

Name: Mahle MS Piston Set GM LSX 415cid 4.065x1.110RCH 4.0 Stk 6.125in Rod .927 Pin -14cc 10.2CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-415cid-4-065x1-110rch-4-0-stk-6-125in-rod-927-p-t14-348888
Price: 912.97 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 415cid 4.065x1.110RCH 4.0 Stk 6.125in Rod .927 Pin -14cc 10.2CR Set of 8

$912.97

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 GM LSX 415cid engines. Features a 4.065" bore and 10.2:1 compression ratio for improved performance.

Key Features

This is a set of 8 Mahle MS forged pistons for GM LSX engines.
Each piston has a 4.065 inch bore and a -14cc dish volume.
The pistons are designed for a 4.000 inch stroke crankshaft and a 6.125 inch connecting rod.
Features a 0.927 inch pin diameter.
The compression ratio is 10.2:1.
Each piston weighs 423 grams.

⚠️ 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 4.065 inch bore pistons are forged from 2618 aluminum, a strong material chosen for its ability to withstand high temperatures and pressures common in performance LSX engines. This set is specifically designed for a 415 cubic inch displacement, working with a 4.000 inch stroke crankshaft and a 6.125 inch connecting rod. The -14cc dish volume contributes to a 10.2:1 compression ratio, which is a notable increase over stock and ideal for naturally aspirated or forced induction builds seeking more power.

Each piston weighs in at 423 grams, a carefully managed weight that balances strength with rotational mass. The 0.927 inch pin diameter is standard for many performance applications, ensuring compatibility with a wide range of connecting rods. These pistons are built for demanding engine builds where reliability and performance are paramount. They are a solid option for anyone rebuilding or upgrading their GM LSX engine for serious performance applications.

This set includes eight pistons, enough for a complete V8 engine. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to Mahle's installation instructions for proper fitment and assembly procedures.