What is the intended compression ratio with these pistons?

These Mahle pistons are designed to achieve a 10.6:1 compression ratio when used with a 3.622-inch stroke and a 6.098-inch connecting rod.

What material are these pistons made from?

The pistons are constructed from 4032 aluminum, a material chosen for its strength and ability to withstand high operating temperatures and pressures.

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 GM LS Piston Set 4.030in Bore 930227730

Name: Mahle MS Piston Set GM LS 370cid 4.030in Bore 3.622in Stk 6.098in Rod .945 Pin -5cc 10.6 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-ls-370cid-4-030in-bore-3-622in-stk-6-098in-rod-945--t14-672209
Price: 907.99 USD
Availability: BackOrder

Mahle MS Piston Set GM LS 370cid 4.030in Bore 3.622in Stk 6.098in Rod .945 Pin -5cc 10.6 CR Set of 8

$907.99

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 GM LS 370cid 4.030in Bore 3.622in Stk 6.098in Rod .945 Pin -5cc 10.6 CR Set of 8 Engine Piston Set

Key Features

This is a set of 8 forged pistons from Mahle.
Constructed from 4032 aluminum for strength and durability.
Features a 4.030-inch bore size.
Designed to achieve a 10.6:1 compression ratio.
Includes a 0.945-inch wrist pin.
Each piston weighs 439 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

These Mahle MS forged pistons are built with 4032 aluminum, a material known for its strength and ability to handle the higher temperatures and pressures found in performance LS engines. With a 4.030-inch bore and a -5cc dish volume, they are designed to achieve a 10.6:1 compression ratio when paired with a 3.622-inch stroke and a 6.098-inch connecting rod, making them a solid choice for a 370 cubic inch displacement build.

Mahle engineers these pistons with a 0.945-inch wrist pin for durability and a 439-gram weight, which is balanced for consistent performance. The specific dish volume and bore size are crucial for tuning your engine's compression, directly impacting power output and fuel efficiency. This set includes all eight pistons, ensuring you have what you need for a complete engine rebuild.

When rebuilding your GM LS engine, using well-built components like these Mahle pistons is key to achieving reliable performance. Remember that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.