What is the compression ratio with these pistons?

When used with a 3.480-inch stroke, 5.700-inch rod, and a -1.6cc dish volume, these pistons achieve a 9.8:1 compression ratio. This is a common target for many performance Small Block Chevrolet builds.

Are these pistons compatible with all Small Block Chevys?

These pistons are specifically designed for a 313 cubic inch displacement Small Block Chevrolet, featuring a 3.786-inch bore. Compatibility depends on your engine's specific bore and stroke combination.

What does 'Not CARB approved' mean for shipping?

This means the pistons do not meet California Air Resources Board emissions standards. Consequently, they cannot be legally shipped to California addresses.

Mahle MS Piston Set 3.786in Bore 930205586

Name: Mahle MS Piston Set SBC 313ci 3.786in Bore 3.480in Stroke 5.700in Rod .927 Pin -1cc 9.8 CR Set of 8
Brand: Mahle
SKU: mahle-mahle-ms-piston-set-sbc-313ci-3-786in-bore-3-480in-stroke-5-700in-rod-927--t14-29084
Price: 1004.60 USD
Availability: BackOrder

Mahle MS Piston Set SBC 313ci 3.786in Bore 3.480in Stroke 5.700in Rod .927 Pin -1cc 9.8 CR Set of 8

$1004.60

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 Chevrolet Small Block 313ci. 3.786in bore, 9.8 CR. Set of 8.

Key Features

Set includes 8 pistons for a complete V8 engine.
Constructed from 4132 aluminum alloy for durability.
Features a 3.786-inch bore size.
Designed with a -1.6cc dish volume for a 9.8:1 compression ratio.
Includes a 0.927-inch pin diameter.
Each piston weighs 417 grams.

This piston set is designed for Chevrolet Small Block engines with a 313 cubic inch displacement.

⚠️ 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

Crafted from 4132 aluminum alloy, this Mahle MS Piston Set is built for performance Small Block Chevrolet engines aiming for a 313 cubic inch displacement. The pistons feature a 3.786-inch bore and a -1.6cc dish volume, which contributes to a 9.8:1 compression ratio when paired with a 3.480-inch stroke and a 5.700-inch connecting rod. Each piston weighs in at 417 grams, a carefully managed weight for optimal reciprocating assembly balance.

These pistons are designed with a 0.927-inch pin diameter, a common size for many performance applications. The 1.550-inch compression height ensures proper deck clearance with the specified rod and stroke combination. Mahle's expertise in piston manufacturing means these are well-built components intended to handle the demands of a performance engine build. They are a solid option for anyone rebuilding or upgrading their SBC top end, aiming for a specific compression target and displacement.

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 consult your engine builder or a professional for specific installation requirements and compatibility checks with your chosen cylinder heads and crankshaft.