What is the compression ratio with these pistons?

These Mahle pistons feature a -5.8cc dish volume, which results in an 11.7:1 compression ratio when used with the specified stroke and rod combination. This is a common ratio for performance builds.

What material are these pistons made from?

The pistons in this set are constructed from 2618 aluminum. This alloy is chosen for its excellent strength and durability, especially under the high temperatures and pressures found in performance engines.

Are these pistons suitable for forced induction?

While these pistons are designed for performance applications and can handle significant stress, their suitability for forced induction depends on the overall engine combination, boost levels, and tuning. It's always best to consult with your engine builder or Mahle's technical resources for specific application advice.

Mahle GM LSX Piston Set 4.130" Bore 930227330

Name: Mahle MS Piston Set GM LSX 442cid 4.130x1.050RCH 4.125 Stk 6.125 Rod .927 Pin -5.8cc 11.7CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-442cid-4-130x1-050rch-4-125-stk-6-125-rod-927-p-t14-348881
Price: 876.98 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 442cid 4.130x1.050RCH 4.125 Stk 6.125 Rod .927 Pin -5.8cc 11.7CR Set of 8

$876.98

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 LSX 442cid engines. Forged construction with 11.7:1 compression ratio.

Key Features

Fits GM LSX 442 cu in engines.
Set of 8 forged pistons.
4.130 inch bore size.
Designed for a 4.125 inch stroke and 6.125 inch rod.
Features a 0.927 inch wrist pin.
Piston dish volume is -5.8cc, resulting in an 11.7:1 compression ratio.

This piston set is designed for Chevrolet LSX 442 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

If you're building a high-performance GM LSX engine, this Mahle MS Piston Set is a solid choice for your 442 cubic inch application. These pistons are designed to handle the demands of a performance build, offering a good balance of strength and weight for your engine's rotating assembly.

This set features pistons with a 4.130-inch bore and a 4.125-inch stroke, designed to work with a 6.125-inch rod and a 0.927-inch pin. The -5.8cc dish volume contributes to an 11.7:1 compression ratio, which is suitable for many naturally aspirated or forced induction setups. Mahle uses 2618 aluminum for these pistons, a material known for its strength and durability under high temperatures and pressures, making them well-suited for performance applications. Each piston weighs in at 441 grams, helping to keep the reciprocating mass manageable for improved engine response.

This set includes eight pistons, enough for a complete V8 engine. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and Mahle's installation instructions for proper fitment and assembly procedures.