What is the compression ratio achieved with these pistons?

When used with compatible cylinder heads, such as LS7 style heads, these pistons contribute to a compression ratio of 11.8:1. The -2.5cc dish volume on each piston is a key factor in achieving this ratio.

What materials are these pistons made from?

These Mahle pistons are constructed from 4032 aluminum. This material is chosen for its balance of strength and controlled thermal expansion, making it well-suited for performance engine builds.

Are these pistons compatible with all LS engines?

This specific piston set is designed for GM LS engines with a 429 cubic inch displacement and LS7-style heads. It's important to verify your engine's specifications and intended use against these details for proper compatibility.

Mahle GM LS Piston Set 4.130in Bore 930221630

Name: Mahle MS Piston Set GM LS 429ci 4.130in Bore 4in Stk 6.125in Rod .927 Pin -3cc 12.2 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-ls-429ci-4-130in-bore-4in-stk-6-125in-rod-927-pin-3-t14-28773
Price: 797.95 USD
Availability: BackOrder

Mahle MS Piston Set GM LS 429ci 4.130in Bore 4in Stk 6.125in Rod .927 Pin -3cc 12.2 CR Set of 8

$797.95

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 LS 429ci engines. Features a 4.130in bore and 11.8 CR for improved performance.

Key Features

This is a set of 8 Mahle MS forged pistons.
Designed for GM LS engines with a 429 cubic inch displacement.
Features a 4.130 inch bore size.
Compatible with a 4.000 inch stroke and 6.125 inch connecting rod.
Utilizes a .927 inch wrist pin.
Each piston has a -2.5cc dish volume.

This piston set is designed for Chevrolet LS7 429 cu in engines. It is not CARB approved and cannot be shipped to California.

⚠️ 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

This Mahle MS Piston Set is designed for GM LS engines displacing 429 cubic inches, specifically those using LS7-style heads. What you get in this set is a complete collection of eight forged pistons, ready to be installed in your engine build. These pistons feature a 4.130-inch bore and are designed to work with a 4.000-inch stroke crankshaft and a 6.125-inch connecting rod, utilizing a .927-inch wrist pin.

Mahle builds these pistons from 4032 aluminum, a well-known material for its strength and thermal expansion properties, making it a solid choice for performance applications. Each piston has a -2.5cc dish volume, contributing to a compression ratio of 11.8:1 when paired with appropriate cylinder heads, like the LS7 style mentioned. This compression ratio is notable for boosting power and throttle response in a performance engine. The pistons weigh in at 440 grams each, which is a reasonable weight for forged aluminum components of this size.

This set is intended for engine builds where performance is key, offering a significant upgrade over stock components. Please note that this piston set is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.