Forged alloy pistons from Keith Black - KB BT41-84 3.498"

392,42€ IVA inc.

Bajo pedido: envío estimado hacia el 26/10/2026

Size: 3,498" (8,9 cm)
SKU: AK-6441-8279 Category: Brand:
Compatible motorcycles (21 models)
Not exactly what you're looking for?Need help finding your spare part? Tell us and we will take care of it.
Locate your spare part
Referencia OEM: 21991-80A
Size 3,498" (8,9 cm)
Brand

Pistoni per moto KB Keith Black Performance

Motorcycle family

, , , ,

Bajo pedido: envío estimado hacia el 26/10/2026

You may also like

Descripción.

These pistons are forged from 4032 alloy which has an 11% silicon content. The pistons are formed in a forging press and then fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation or pre-ignition, giving the best resistance against breaking. Since 4032 alloy has a low expansion rate, but higher than Keith Black hypereutectic pistons, a piston 0.001" larger will be required for more wall clearance. The Keith Black forged alloy pistons are suitable for street and high-performance racing applications including high compression and bikes equipped with NOS. All pistons come with a Hastings piston ring set, piston pins and spiral-lock piston rings.

Specifications

OEM 21991-80A
Pack 1
HS Code 8714109090
Origin US
Motorcycle family Big Twin | FX | FXR | Softail | Touring

Contact

Av. Ingeniero José
Alegría nº 4, Bajo 2
30007 Murcia Tel.663663739

Métodos de pago

en