What is the compression ratio with these pistons?

These pistons feature a -5.5cc dish, which helps achieve a 10.5:1 compression ratio when used with appropriate cylinder heads and head gaskets for your specific engine build.

What material are these pistons made from?

The pistons are constructed from 4032 aluminum. This material is chosen for its balance of strength and controlled thermal expansion, which is beneficial for performance engines.

Are these pistons legal for use in California?

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

Mahle MS Piston Set SBM 365ci 4.030in Bore 930270130

Name: Mahle MS Piston Set SBM 365ci 4.030in Bore 3.58in Stroke 6.123in Rod .984 Pin -5cc 10.5 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbm-365ci-4-030in-bore-3-58in-stroke-6-123in-rod-984-p-t14-29250
Price: 874.85 USD
Availability: BackOrder

Mahle MS Piston Set SBM 365ci 4.030in Bore 3.58in Stroke 6.123in Rod .984 Pin -5cc 10.5 CR Set of 8

$874.85

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 Small Block Mopar 365ci engines. 4.030in bore, 10.5 CR.

Key Features

Fits Chrysler Small Block 365 cu in. engines.
Designed for Small Block Mopar (LA) 340, 360 engines.
Flat top piston design with a -5.5cc dish.
Achieves a 10.5:1 compression ratio.
4.030 inch bore size.
Constructed from 4032 aluminum for strength and thermal stability.

This piston set is designed for Chrysler Small Block 365 cu in. engines, specifically the Mopar (LA) 340 and 360 platforms. Always confirm 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

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Product Details

Mahle is a well-known name in engine components, and their MS Piston Set is built for serious performance builds. This set is specifically designed for Small Block Mopar (LA) 340 and 360 engines, giving you a solid foundation for a 365 cubic inch displacement. If you're rebuilding the top end of your Mopar, these pistons are a key piece of the puzzle.

These pistons feature a flat-top design with a -5.5cc dish, contributing to a 10.5:1 compression ratio when paired with the right cylinder heads and gasket. The bore size is 4.030 inches, with a 3.580-inch stroke and a 6.123-inch rod length. They use a standard 0.984-inch wrist pin, making them compatible with many common connecting rods. The pistons are constructed from 4032 aluminum, a material known for its strength and thermal expansion properties, which helps prevent piston slap and ensures a good seal. Each piston weighs in at approximately 480 grams, keeping rotating mass in check for improved engine response.

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 and the manufacturer's installation instructions for proper assembly and tuning.