What is the compression ratio with these pistons?

These Mahle MS pistons feature a -5.8cc dish volume, which results in an 11.5:1 compression ratio when used with compatible cylinder heads and a 4.125 inch stroke crankshaft.

What material are these pistons made from?

The pistons are forged from 2618 aluminum, a material chosen for its high strength and durability, making it suitable for demanding engine builds.

Are these pistons compatible with all LSX engines?

This set is specifically designed for 431 cubic inch GM LSX engines with a 4.080 inch bore. It's crucial to confirm your engine's specifications match these requirements before purchase.

Mahle GM LSX 431cid Piston Set 930227280

Name: Mahle MS Piston Set GM LSX 431cid 4.080x1.050RCH 4.125 Stk 6.125 Rod .927 Pin -5.8cc 11.5CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-431cid-4-080x1-050rch-4-125-stk-6-125-rod-927-p-t14-348879
Price: 859.74 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 431cid 4.080x1.050RCH 4.125 Stk 6.125 Rod .927 Pin -5.8cc 11.5CR Set of 8

$859.74

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 431cid engines. Features 4.080" bore and 11.5:1 compression ratio for improved performance.

Key Features

Fits GM LSX 431 cu in engines.
Set includes 8 pistons.
Constructed from 2618 aluminum for strength.
Features a 4.080 inch bore size.
Designed for a 4.125 inch stroke and 6.125 inch rod.
Includes 0.927 inch pin diameter.

This piston set is designed for GM LSX 431 cu in engines. Please verify compatibility with your specific engine configuration.

⚠️ 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 rebuilding the top end of your GM LSX engine and looking for a well-built set of pistons, this Mahle MS Piston Set is a solid option. Designed for 431 cubic inch displacement, these pistons are crafted from 2618 aluminum, a material known for its strength and durability under high stress. This set is engineered to work with a 4.125 inch stroke and a 6.125 inch rod, featuring a 0.927 inch pin diameter. The specific dish volume of -5.8cc contributes to an 11.5:1 compression ratio, which is ideal for naturally aspirated or forced induction applications where you want a noticeable bump in power without sacrificing too much drivability.

Mahle has a long-standing reputation for producing reliable engine components, and this piston set is no exception. Each piston weighs in at 433 grams, which is a good balance for performance and reliability in a stroker engine build. The 4.080 inch bore size is a common specification for many LSX builds, and the 1.050RCH (ring groove height) ensures proper ring seal. This set includes all eight pistons, ready for your machine shop to hone the cylinders to the correct size and for your engine builder to assemble your next high-performance engine.

When considering a piston set like this, it's important to ensure your block is prepared for the 4.080 inch bore and that your crankshaft and connecting rods are compatible with the specified stroke and pin dimensions. Remember that this part is not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified professional for specific application advice and installation procedures.