What material are these Mahle pistons made from?

These Mahle MS pistons are forged from 2618 aluminum. This material is chosen for its strength and ability to handle the high temperatures and pressures found in performance engine builds.

What is the compression ratio achieved with these pistons?

With a 9.0cc dish volume, these pistons achieve a 13.1:1 compression ratio. This is suitable for naturally aspirated performance applications seeking maximum power.

Are these pistons compatible with all Chevrolet Small Block engines?

No, these pistons are specifically designed for the Chevrolet Small Block 403 cubic inch engine. Always verify your engine's displacement and configuration before purchasing.

Mahle Forged Piston Set 4.135in Bore 13.1 CR 197754535

Name: Mahle MS Piston Set Chevy SB 403ci 4.135in Bore 3.5/3.75 Stroke 6.125/6 Rod .927 HD Pin 9cc 13.9CR
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-chevy-sb-403ci-4-135in-bore-3-5-3-75-stroke-6-125-6-ro-t14-131410
Price: 1063.77 USD
Availability: BackOrder

Mahle MS Piston Set Chevy SB 403ci 4.135in Bore 3.5/3.75 Stroke 6.125/6 Rod .927 HD Pin 9cc 13.9CR

$1063.77

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 Chevy SB 403ci engines. Features a 4.135in bore and 13.1 CR for improved performance.

Key Features

Fits Chevrolet Small Block 403 cu in engines.
Forged from 2618 aluminum for strength and durability.
Features a 4.135-inch bore size.
Designed for a 3.500-inch stroke and 6.125-inch connecting rod.
Includes a 0.927-inch heavy-duty wrist pin.
9.0cc dish volume creates a 13.1:1 compression ratio.

This piston set is designed for Chevrolet Small Block 403 cubic inch engines. It is not CARB approved and cannot be shipped 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, especially for their high-performance pistons. This Mahle MS Piston Set is built for Chevrolet Small Block 403 cubic inch engines, designed to handle demanding builds where reliability and power are key. If you're assembling a performance engine or rebuilding your top end for more power, a solid set of pistons like these is fundamental to achieving your goals.

These pistons are forged from 2618 aluminum, a strong material chosen for its ability to withstand high temperatures and pressures common in performance applications. They feature a 4.135-inch bore and are designed to work with a 3.500-inch stroke crankshaft and a 6.125-inch connecting rod, with a 0.927-inch heavy-duty pin. The 9.0cc dish volume results in a 13.1:1 compression ratio, which is ideal for naturally aspirated performance builds looking for maximum power output. Each piston weighs in at 450 grams, contributing to a well-balanced rotating assembly.

When installing these pistons, pay close attention to the manufacturer's specifications for ring gap and bearing clearance to ensure optimal performance and longevity. Remember that this piston set is not CARB approved and cannot be shipped to California. Always consult your engine builder or a trusted mechanic for specific installation advice tailored to your build.