What is the compression ratio with these pistons?

These pistons feature a 2.1cc dish volume. When used with a 3.622-inch stroke and a 6.098-inch connecting rod, they achieve a 9.9:1 compression ratio.

Are these pistons suitable for all LS engines?

This set is specifically designed for 325 cubic inch LS engines. While they are forged replacements, it's crucial to verify that the bore size, stroke, rod length, and pin size match your specific engine configuration.

Can these pistons be shipped to California?

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

Mahle LS Piston Set 3.78in Bore 930218980

Name: Mahle MS LS Piston Set 325ci 3.78in. Bore 3.622 Stroke 6.098 Rod 0.943 Pin 2.1cc 9.9CR - Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-ls-piston-set-325ci-3-78in-bore-3-622-stroke-6-098-rod-0-943-pin--t14-838530
Price: 907.56 USD
Availability: InStock

Mahle MS LS Piston Set 325ci 3.78in. Bore 3.622 Stroke 6.098 Rod 0.943 Pin 2.1cc 9.9CR - Set of 8

$907.56

Only 1 left in stock

Mahle LS Piston Set 325ci 3.78in. Bore 3.622 Stroke 6.098 Rod 0.943 Pin 2.1cc 9.9CR - Set of 8. Forged replacement pistons for LS engines.

Key Features

Set of 8 forged pistons for LS engines.
Designed for 325 cubic inch displacement.
Features a 3.780 inch bore and 1.330 inch compression height.
Includes 0.943 inch wrist pins.
Piston dish volume is 2.1cc, resulting in a 9.9:1 compression ratio.
Each piston weighs 432 grams.

These pistons are designed for Chevrolet LS 325 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

Mahle is a well-known name in engine components, recognized for their expertise in piston technology. This Mahle MS LS Piston Set is built for LS engines, specifically designed as a forged replacement assembly for 325 cubic inch applications. If you're rebuilding or upgrading your LS engine, these pistons are engineered to meet the demands of a performance build.

This set includes eight pistons, each weighing 432 grams, and features a 3.780-inch bore with a 1.330-inch compression height. The design incorporates a 2.1cc dish volume, contributing to a 9.9:1 compression ratio when paired with a 3.622-inch stroke and a 6.098-inch connecting rod. The pin size is 0.943 inches. These are forged pistons, meaning they are constructed from a solid block of aluminum alloy (2618) that is heated and hammered into shape, making them exceptionally strong and durable for high-performance use.

It's important to note that these pistons are not CARB approved and cannot be shipped to California. Ensure you check all manufacturer specifications and installation guidelines before beginning your engine build. This set is designed for a direct fit into compatible LS engine configurations.