What is the compression ratio with these pistons?

These pistons contribute to a 13.1:1 compression ratio. The final compression ratio will also depend on your cylinder head volume and head gasket thickness.

What material are these pistons made from?

The pistons are constructed from 2618 aluminum. This material is chosen for its strength and ability to handle high temperatures and pressures found in performance engines.

Are these pistons suitable for all LSX engines?

This specific set is designed for 434 cubic inch displacement LSX engines with a 4.155-inch bore and 4.000-inch stroke. It's crucial to verify these dimensions match your engine build requirements.

Mahle LSX Piston Set 4.155" Bore 13.1 CR 930229755

Name: Mahle MS Piston Set GM LSX 434cid 4.155x1.110RCH 4.0 Stk 6.125 Rod .927 Pin 5.6cc 13.8CR - Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-434cid-4-155x1-110rch-4-0-stk-6-125-rod-927-pin-t14-348899
Price: 969.34 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 434cid 4.155x1.110RCH 4.0 Stk 6.125 Rod .927 Pin 5.6cc 13.8CR - Set of 8

$969.34

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 434cid. 4.155" bore, 13.1 CR, 6.125" rod length. Set of 8.

Key Features

Set of 8 Mahle MS pistons for GM LSX 434cid engines.
Designed for a 4.155-inch bore and 4.000-inch stroke.
Features a 6.125-inch rod length and 0.927-inch pin diameter.
Flat-top piston design with a 5.6cc dish.
Contributes to a 13.1:1 compression ratio.
Each piston weighs approximately 494 grams.

This piston set is designed for Chevrolet LSX 434 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

Mahle is a well-known name in engine components, often supplying parts for original equipment manufacturers. This set of eight Mahle MS pistons is built for GM LSX engines displacing 434 cubic inches. These pistons are designed to work with a 4.155-inch bore and a 4.000-inch stroke, featuring a 6.125-inch rod length and a 0.927-inch pin diameter.

These are flat-top pistons with a 5.6cc dish, contributing to a 13.1:1 compression ratio when paired with the right cylinder heads and gasket combination. Each piston weighs approximately 494 grams, which is a notable consideration for engine balance. The pistons are constructed from 2618 aluminum, a material known for its strength and ability to withstand high temperatures and pressures, making it a solid choice for performance builds.

This set is intended for serious engine builds where precise component matching is crucial. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper assembly and tuning.