What is the compression ratio achieved with these pistons?

When used with a 3.622-inch stroke, 6.125-inch rod length, and 0.927-inch pin, these pistons achieve a 10.1 compression ratio. This is a common target for many performance LSX engine builds.

Are these pistons suitable for a stock LS engine rebuild?

These pistons are designed for performance applications and high-performance GM LSX engines. While they can be used in a rebuild, they are best suited for builds aiming for increased power and durability beyond stock specifications.

What does 'Not CARB approved' mean for shipping?

This means the pistons do not meet California Air Resources Board (CARB) emissions standards. Consequently, they cannot be legally shipped to California.

Mahle GM LSX Piston Set 4.065" Bore 930227865

Name: Mahle MS Piston Set GM LSX 1.304 x 4.065 -5.8cc FT Combo 4032 - Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-gm-lsx-1-304-x-4-065-5-8cc-ft-combo-4032-set-of-8-t14-567277
Price: 820.08 USD
Availability: BackOrder

Mahle MS Piston Set GM LSX 1.304 x 4.065 -5.8cc FT Combo 4032 - Set of 8

$820.08

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 GM LSX 1.304 x 4.065 -5.8cc FT Combo 4032 - Set of 8. For high-performance GM LSX engines.

Key Features

Fits Chevrolet LS 376 cu in engines.
Set includes 8 pistons.
Features a 4.065 inch bore size.
Constructed from durable 4032 aluminum alloy.
Includes -5.8cc valve reliefs for camshaft and valve clearance.
Each piston weighs 452 grams for balanced rotating assembly.

This piston set is designed for Chevrolet LS 376 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

Secure CheckoutFast Shipping631-982-0042

Product Details

If you're building a high-performance GM LSX engine, getting the right pistons is crucial for reliability and power. This Mahle MS piston set is designed for 376 cubic inch applications, featuring a 4.065-inch bore and a 1.304-inch compression height. These pistons are built from 4032 aluminum, a material known for its strength and durability, making it a solid choice for demanding builds. The -5.8cc valve reliefs are designed to provide proper clearance for your camshaft and valves, ensuring smooth operation and preventing interference.

Each piston in this set weighs in at 452 grams, contributing to a well-balanced rotating assembly, which is key for high RPM performance and engine longevity. The combination of the 4.065-inch bore, 3.622-inch stroke, 6.125-inch rod length, and 0.927-inch pin diameter results in a 10.1 compression ratio, suitable for many performance applications. Mahle is a well-known name in engine components, and this set reflects their commitment to well-built parts for serious engine work. Remember that these pistons are not CARB approved and cannot be shipped to California.