What is the compression ratio of this piston set?

This Mahle MS Piston Set is designed to achieve a 10.5:1 compression ratio when used with stock stroke and rod configurations for the Honda B16 engine. The -1cc dish volume contributes to this specific ratio.

What material are these pistons made from?

These pistons are constructed from 4032 aluminum. This alloy is chosen for its strength and good thermal expansion properties, making it suitable for performance engine applications.

Are these pistons CARB approved?

No, these pistons are not CARB approved and cannot be shipped to California. Please check local regulations if you are outside of California.

Mahle Forged Piston Set 81.5mm Bore 10.5 CR 929112109

Name: Mahle MS Piston Set 81.5mm Bore 87.2mm Stroke Stock 138mm Rod 21mm Pin -1cc 10.5 CR Set of 4 - Acura
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-81-5mm-bore-87-2mm-stroke-stock-138mm-rod-21mm-pin-1cc-t14-191118
Price: 574.82 USD
Availability: BackOrder

Mahle MS Piston Set 81.5mm Bore 87.2mm Stroke Stock 138mm Rod 21mm Pin -1cc 10.5 CR Set of 4 - Acura

$574.82

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 Honda B16 1.6L engines. 81.5mm bore, 10.5:1 CR. Set of 4.

Key Features

Fits Honda B16 1.6L DOHC VTEC engines.
Constructed from 4032 aluminum for improved thermal stability.
Features an 81.5mm bore size.
Includes a -1cc dish volume for a 10.5:1 compression ratio with stock components.
Each piston weighs 290g for balanced rotating assembly.
Utilizes a 21mm pin diameter for strong connecting rod interface.

This piston set is designed for Honda B16 1.6L engines. Please verify compatibility with your specific engine code.

⚠️ 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's MS Piston Set is built with 4032 aluminum, a material known for its strength and resistance to thermal expansion, making it a solid choice for performance engine builds. These pistons are designed for the Honda/Acura B16 DOHC VTEC 1.6L engine, featuring an 81.5mm bore and a -1cc dish volume, which results in a 10.5:1 compression ratio when paired with a stock stroke and rod combination. This specific compression ratio is a popular target for naturally aspirated builds aiming for improved throttle response and power without compromising too much on fuel requirements.

Each piston weighs in at 290g, contributing to a well-balanced rotating assembly, which is crucial for engine longevity and smooth operation at higher RPMs. The 21mm pin diameter is standard for many performance applications, ensuring a strong connection between the piston and connecting rod. Mahle has a long history of producing well-made engine components, and this piston set reflects that experience, offering a reliable foundation for your engine's top end rebuild.

This set includes four pistons, ready for installation. Please note that these pistons are not CARB approved and cannot be shipped to California. It's always recommended to consult with your engine builder or refer to Mahle's installation guidelines for specific details regarding assembly and break-in procedures to ensure optimal performance and durability.