What is the compression ratio achieved with these pistons?

These Mahle MS pistons are designed to achieve a 9.9:1 compression ratio. This is achieved through the combination of the piston's -20cc dish volume and the specific bore, stroke, and cylinder head volume used in your engine build.

What material are these pistons made from?

These pistons are forged from 2618 aluminum. This material is chosen for its strength and durability, making it well-suited for high-performance engine applications.

Are these pistons compatible with all LS engines?

These pistons are specifically designed for LSX engines with a 429 cubic inch displacement and feature a 4.070-inch bore. While they are for LS-based engines, it's crucial to verify that your specific engine configuration matches these specifications for proper fitment.

Mahle LSX 429cid Piston Set 930230070

Name: Mahle MS Pistons LSX 429cid 4.070in Bore 4.125in Stk 6.125in Rod .927 Pin -20cc Dish 9.9CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-pistons-lsx-429cid-4-070in-bore-4-125in-stk-6-125in-rod-927-pin-2-t14-402591
Price: 912.97 USD
Availability: BackOrder

Mahle MS Pistons LSX 429cid 4.070in Bore 4.125in Stk 6.125in Rod .927 Pin -20cc Dish 9.9CR 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 Pistons LSX 429cid 4.070in Bore 4.125in Stk 6.125in Rod .927 Pin -20cc Dish 9.9CR Set of 8. Engine Piston Set

Key Features

This set includes eight Mahle MS forged pistons.
Designed for LSX engines with a 429 cubic inch displacement.
Features a 4.070-inch bore and a -20cc dish volume.
Compatible with a 4.125-inch crankshaft stroke and 6.125-inch connecting rod.
Utilizes a .927-inch pin diameter.
Achieves a 9.9:1 compression ratio.

These pistons are designed for Chevrolet LS 429 cu in engines. Not CARB approved and cannot ship 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 set includes eight Mahle MS forged pistons designed for LSX engines displacing 429 cubic inches. Each piston features a 4.070-inch bore, a 4.125-inch stroke compatibility, and a 6.125-inch rod length with a .927-inch pin diameter. The -20cc dish volume contributes to a 9.9:1 compression ratio, making these pistons suitable for performance engine builds where precise compression is key.

Crafted from 2618 aluminum, these pistons are well-built for demanding applications. The 4.070-inch bore size is a common specification for many LSX engine builds, and the -20cc dish helps achieve the target 9.9 compression ratio when paired with the appropriate cylinder heads and crankshaft stroke. Each piston weighs approximately 415 grams, which is a typical weight for forged aluminum pistons of this size and strength, balancing durability with rotational mass.

This set is intended for engine builders looking for a solid foundation for a high-performance naturally aspirated or forced induction LSX engine. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to manufacturer installation instructions for proper fitment and assembly procedures.