What is the compression ratio with these pistons?

These pistons have a -5.8cc dish volume. When used with appropriate cylinder heads and head gaskets for a 388 cubic inch LSX engine, they will achieve a 10.4:1 compression ratio.

What size connecting rods and wrist pins are these pistons designed for?

These pistons are designed to work with 6.125 inch connecting rods and feature a 0.927 inch wrist pin diameter, which is a common size for performance LSX applications.

Can these pistons be shipped to California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

Mahle LSX Piston Set 930226930 - GM LSX 388cid

Name: Mahle MS Piston Set GM LSX 388cid 4.130x1.304CH 3.622 Stk 6.125 Rod .927 Pin -5.8cc 10.4CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-388cid-4-130x1-304ch-3-622-stk-6-125-rod-927-pi-t14-348857
Price: 834.05 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 388cid 4.130x1.304CH 3.622 Stk 6.125 Rod .927 Pin -5.8cc 10.4CR Set of 8

$834.05

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 388cid engines. Features 4.130 bore, 10.4:1 CR, and 6.125 rod length. Set of 8.

Key Features

Fits Chevrolet LSX 388 cu in engines.
Forged from 2618 aluminum for strength.
4.130 inch bore size.
-5.8cc dish volume for a 10.4:1 compression ratio.
Designed for 6.125 inch connecting rods and 0.927 inch pins.
Each piston weighs 481 grams.

This piston set is designed for Chevrolet LSX 388 cu in engines. Always confirm compatibility with your specific engine build specifications.

⚠️ 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 well-known for making solid engine components, and this piston set for GM LSX engines is a prime example of their work. If you're building a high-performance 388 cubic inch LSX engine, these pistons are designed to handle the demands of a serious build. They feature a 4.130-inch bore and are engineered to work with a 6.125-inch connecting rod and a 3.622-inch stroke, which is a common setup for this displacement.

These are forged pistons, made from 2618 aluminum, which is a strong material choice for high-stress applications. They have a -5.8cc dish volume, contributing to a 10.4:1 compression ratio when paired with the right cylinder heads and gasket. Each piston weighs in at 481 grams, which is a reasonable weight for a forged piston of this size, helping to keep reciprocating assembly balance in check. The pin diameter is 0.927 inches, a standard size for many performance LSX builds.

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 for proper installation and assembly details.