What is the compression ratio with these pistons?

These pistons feature a -20cc dish volume. When used with appropriate cylinder heads and a standard deck height, they will result in a 9.9:1 compression ratio for your 428cid LSX engine.

What material are these pistons made from?

The pistons are constructed from 2618 aluminum, a well-known material in performance engine building for its strength and ability to withstand high 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 LSX 428cid Piston Set 4.065in Bore - Mahle 930230065

Name: Mahle MS Pistons LSX 428cid 4.065in Bore 4.125in Stk 6.125in Rod .927 Pin -20cc Dish 9.9CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-pistons-lsx-428cid-4-065in-bore-4-125in-stk-6-125in-rod-927-pin-2-t14-402587
Price: 912.97 USD
Availability: BackOrder

Mahle MS Pistons LSX 428cid 4.065in 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 428cid 4.065in Bore 4.125in Stk 6.125in Rod .927 Pin -20cc Dish 9.9CR Set of 8Engine Piston Set

Key Features

Fits Chevrolet LS 428 cu in engines.
4.065 inch bore size.
Designed for a 4.125 inch stroke and 6.125 inch connecting rod.
Features a -20cc dish volume for a 9.9:1 compression ratio.
Constructed from 2618 aluminum for strength.
Each piston weighs 413 grams.

This piston set is designed for Chevrolet LS engines with a 428 cubic inch displacement. 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

If you're building a high-performance LSX engine, Mahle's MS Piston set for 428 cubic inches is a solid choice. These pistons are designed for the demands of a serious build, offering a robust foundation for your engine's power. They feature a 4.065-inch bore and are engineered to work with a 4.125-inch stroke and a 6.125-inch connecting rod, creating the 428cid displacement. The -20cc dish volume contributes to a 9.9:1 compression ratio when paired with appropriate cylinder heads and deck height.

Crafted from 2618 aluminum, these pistons are well-built for strength and durability under high stress. Each piston weighs in at 413 grams, contributing to a balanced rotating assembly. The 0.927-inch pin diameter is standard for many performance LS applications. This set includes all eight pistons needed for a V8 engine, ensuring you have what you need to complete your engine build.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For optimal performance and longevity, ensure proper balancing of your rotating assembly and follow manufacturer guidelines for installation and break-in procedures.