What is the compression ratio achieved with these pistons?

These Mahle pistons are designed to achieve a 10.6:1 compression ratio when used with a 3.622-inch stroke crankshaft, a 6.125-inch connecting rod, and the specified -5.8cc valve reliefs. Always verify calculations based on your specific engine build.

Are these pistons suitable for all Chevrolet LS engines?

These pistons are specifically designed for 370 cubic inch LS engines. While they are part of the LS engine family, their dimensions and intended displacement mean they are not a universal fit for all LS variants.

What does the 'Not CARB approved' note mean?

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

Mahle Forged Piston Set 930227830 - 370cid

Name: Mahle MS Piston 370cid 4.030 x 1.304 CH 3.622 STK 6.125 Rod 0.927 Pin -5.8cc 10.6CR - Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-370cid-4-030-x-1-304-ch-3-622-stk-6-125-rod-0-927-pin-5-8c-t14-635177
Price: 820.08 USD
Availability: BackOrder

Mahle MS Piston 370cid 4.030 x 1.304 CH 3.622 STK 6.125 Rod 0.927 Pin -5.8cc 10.6CR - 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 forged piston set for Chevrolet LS 370 cu in engines. Set of 8 pistons.

Key Features

Fits Chevrolet LS 370 cu in engines.
Set includes 8 forged pistons.
Constructed from 4032 aluminum for strength and durability.
4.030 inch bore size.
1.304 inch compression height.
Designed for a 6.125 inch rod and 3.622 inch stroke.

⚠️ 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, particularly for their high-performance pistons. This set of eight forged pistons is built for the Chevrolet LS engine platform, specifically for a 370 cubic inch displacement. These aren't your average pistons; they're forged from 4032 aluminum, a material chosen for its strength and ability to handle the stresses of a high-performance engine build. The 4.030-inch bore size is standard for many 370ci builds, and the 1.304-inch compression height combined with a 6.125-inch rod length and 3.622-inch stroke results in a 10.6:1 compression ratio with the -5.8cc valve reliefs.

Each piston weighs in at 438 grams, which is a good balance for performance and durability in this application. The 0.927-inch wrist pin diameter is a common size, making it easier to find compatible connecting rods. These pistons are designed to work with a 3.622-inch stroke crankshaft and a 6.125-inch connecting rod, which is a popular combination for building a 370 cubic inch LS engine. The -5.8cc valve reliefs are designed to provide adequate clearance for most common camshaft profiles, helping to prevent piston-to-valve contact.

When building a performance engine, the pistons are a critical component, and this Mahle set offers a solid foundation. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.