What is the compression ratio these pistons achieve?

These Wiseco custom pistons are designed to achieve a 10.7:1 compression ratio. This is calculated with a -1cc dome volume and assumes standard deck height and head gasket thickness for LS engines.

Are these pistons compatible with all LS engines?

These pistons are specifically designed for LS engines with a 3.900-inch bore. Compatibility also depends on your engine's stroke, pin size, and other internal components. It's recommended to verify all specifications with your engine builder.

Can these pistons be shipped to California?

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

Wiseco LS Custom Pistons 3.900in Bore 10.7:1 Comp - Set of 8

Name: Wiseco LS 3.900in Str 4.005x1.165 -1cc Dome 10.7:1 Custom Pistons - Set of 8 (SPECIAL ORDER)
Brand: Wiseco
SKU: wiseco-wiseco-ls-3-900in-str-4-005x1-165-1cc-dome-10-7-1-custom-pistons-set-of-8-t14-635002
Price: 252.39 USD
Availability: BackOrder

Wiseco LS 3.900in Str 4.005x1.165 -1cc Dome 10.7:1 Custom Pistons - Set of 8 (SPECIAL ORDER)

$252.39

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wiseco LS custom forged pistons. 3.900in bore, 10.7:1 compression ratio, -1cc dome. Set of 8. Special order, not CARB approved.

Key Features

Fits LS engines with a 3.900-inch bore.
Achieves a 10.7:1 compression ratio with a -1cc dome volume.
Forged construction for strength and durability.
Designed for a 4.005-inch stroke and 1.165-inch pin size.
Set includes 8 custom pistons.
Special order item; not CARB approved and cannot ship to California.

These are custom pistons designed for LS engines. Always confirm compatibility with your specific engine build and components before ordering.

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Product Details

Wiseco is well-known for making strong, reliable forged pistons for performance applications. This set of custom pistons is built for LS engines and features a 3.900-inch bore size. They are designed to achieve a 10.7:1 compression ratio with a -1cc dome volume, making them a solid choice for builders looking for specific performance characteristics.

Each piston in this set of eight is forged from durable materials, ensuring they can handle the demands of a performance engine build. The 4.005-inch stroke compatibility and 1.165-inch pin size are key dimensions for proper fitment and function within your LS engine. These are custom pistons, meaning they are made to order and not typically kept in stock, so please allow for special order lead times.

Please note that these pistons are not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified professional to ensure these pistons are the correct choice for your specific engine build and intended use.