What is the compression ratio achieved with these pistons?

These Mahle MS pistons feature a -26cc dish volume, which, when combined with the specified engine dimensions, results in a calculated compression ratio of 9.2:1. This ratio is suitable for many performance applications.

What materials are these pistons made from?

The pistons in this set are constructed from 4032 aluminum alloy. This material is known for its strength and durability, making it a popular choice for performance engine builds.

Are these pistons compatible with all Small Block Ford engines?

This specific piston set is designed for SBF engines targeting a 434 cubic inch displacement, with a 4.090-inch bore and intended for use with a 4.125-inch stroke and 6.7-inch connecting rods. It is also noted for Ford FE 433 cu in applications. Always verify compatibility with your specific engine build.

Mahle MS Piston Set SBF 434ci 4.090in Bore 4.125in Stroke 6.

Name: Mahle MS Piston Set SBF 434ci 4.090in Bore 4.125in Stroke 6.7in Rod .990 Pin -26cc 9.2 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbf-434ci-4-090in-bore-4-125in-stroke-6-7in-rod-990-pi-t14-28921
Price: 870.67 USD
Availability: BackOrder

Mahle MS Piston Set SBF 434ci 4.090in Bore 4.125in Stroke 6.7in Rod .990 Pin -26cc 9.2 CR Set of 8

$870.67

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 SBF 434ci engines. Features 4.090in bore, 4.125in stroke, and 6.7in rod. Part# 930264190. Not CARB approved. Fast shipping.

Key Features

This is a set of 8 pistons for a 434 cubic inch SBF engine.
Features a 4.090 inch bore and is designed for a 4.125 inch stroke.
Intended for use with 6.700 inch connecting rods and a 0.990 inch wrist pin.
The -26cc dish volume contributes to a 9.2:1 compression ratio.
Constructed from 4032 aluminum alloy for durability.
Each piston weighs approximately 516 grams.

⚠️ 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

Built from 4032 aluminum alloy, this Mahle MS piston set is designed for high-performance SBF (Small Block Ford) engines targeting a 434 cubic inch displacement. The pistons feature a 4.090-inch bore, a 4.125-inch stroke, and are intended to be used with a 6.700-inch connecting rod and a 0.990-inch wrist pin. This combination is key to achieving the desired compression ratio and engine geometry for serious builds.

The -26cc dish volume on these pistons, combined with the other specified dimensions, results in a calculated compression ratio of 9.2:1. This is a popular target for naturally aspirated or forced induction builds where pump gas compatibility is a consideration, offering a good balance between power and drivability. Each piston weighs in at approximately 516 grams, contributing to a well-balanced rotating assembly, which is crucial for engine longevity and smooth operation at higher RPMs.

This set includes eight pistons, all the necessary components for a complete engine rebuild. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always consult with your engine builder or refer to Mahle's detailed specifications for proper installation and compatibility with other engine components.