# Wiseco HD 1340 Evo BB 9.51 CR 3740XH Piston Kit

V-Twin performance has been around since some of the earliest days of motorcycle racing and engine modification, and Wiseco has been there since the beginning. Applying over 80 years of experience, Wiseco has fine-tuned its V-Twin pistons for each specific engine platform to optimize performance and durability. From reliable rebuilds to all-out race, Wiseco has the pistons for your V-Twin build.

-   Complete Package: Each piston includes a wrist pin, rings, and circlips, providing everything needed for installation
-   Forged Material: Optimizes strength and service life, ensuring durability under high-stress conditions
-   Performance-Enhancing Features: Varied across applications to maximize both durability and power
-   Improved tensile strength of forged material optimizes strength and service life
-   Optimized compression ratio to fit your build and performance goals
-   Designed and built specifically for each V-Twin engine platform
-   Engineered, forged, and machined in the USA in Mentor, OH
-   Wrist pin, rings and circlips included
-   3.740 in. Bore, 9.5:1 CR

This Part Fits:

Year

Make

Model

Submodel

1994-1998

Harley-Davidson

FLHR Road King

Base

1998

Harley-Davidson

FLHRCI Road King Classic

Base

1996-1997

Harley-Davidson

FLHRI Road King

Base

1987-1993

Harley-Davidson

FLHS Electra Glide Sport

Base

1988,1995-1998

Harley-Davidson

FLHT Electra Glide Standard

Base

1984-1998

Harley-Davidson

FLHTC Electra Glide Classic

Base

1996-1998

Harley-Davidson

FLHTCI Electra Glide Classic

Base

1989-1997

Harley-Davidson

FLHTCU Electra Glide Ultra Classic

Base

1995-1998

Harley-Davidson

FLHTCUI Electra Glide Ultra Classic

Base

1986-1990

Harley-Davidson

FLST Heritage Softail

Base

1988-1999

Harley-Davidson

FLSTC Heritage Softail Classic

Base

1991-1996

Harley-Davidson

FLSTF Fat Boy

Base

1996-1999

Harley-Davidson

XL1200C Sportster 1200 Custom

Base

1996-1999

Harley-Davidson

XL1200S Sportster 1200 Sport

Base

1999

Harley-Davidson

XL883C Sportster 883 Custom

Base

1986-1995

Harley-Davidson

XLH883DLX Sportster 883 Deluxe

Base

1987-1999

Harley-Davidson

XLH883HUG Sportster 883 Hugger

Base

## Details

- **Price:** 315.94 CAD
- **Vendor:** Wiseco
- **Type:** Piston Sets - Powersports

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 315.94 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- Photo - out of package
- Photo - out of package
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- Photo - out of package
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- Photo - out of package
- Photo - out of package
- Photo - out of package

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/wiseco-hd-1340-evo-bb-9-51-cr-3740xh-piston-kit)
> Updated: 2026-07-14