# S&S Cycle 2018+ Oil Cooled M8 Softail Models MK136B Black Edition Engine w/ 475G Cam

Introducing the next generation of Proven Performance for your 2018-2024 H-D® Softail® Models, the MK136B Engine . This is the newest version of the complete crate engines S&S is known for, ready to install in your M8 Softail. S&S took the MKB-Series Crankcases, married them to the 136" cylinders and flywheels, and then fit High-flow cylinder heads with +1mm Valves and .605" springs. This is everything you need to have the largest, most powerful, and most reliable crate engine on the market today.

-   High-strength alloy used in cylinder head casting, improved strength at high temperatures
-   High-flow cylinder heads with premium seats, guides, valves, springs, and seals
-   Valves are .030" longer than stock for improved valvetrain geometry
-   1mm oversized intake and exhaust valves
-   All premium quality components
-   Sprocket shaft spacer included
-   .605" max lift valve springs
-   Billet aluminum covers

This Part Fits:

Year

Make

Model

Submodel

2018-2020

Harley-Davidson

FLDE Deluxe 107

Base

2018-2020

Harley-Davidson

FLFB Fat Boy 107

Base

2018-2023

Harley-Davidson

FLFBS Fat Boy 114

Base

2018-2024

Harley-Davidson

FLSB Sport Glide 107

Base

2018-2021

Harley-Davidson

FLSL Softail Slim 107

Base

2018-2019

Harley-Davidson

FXBB Street Bob 107

Base

2021-2024

Harley-Davidson

FXBBS Street Bob 114

Base

2018-2019

Harley-Davidson

FXBR Breakout 107

Base

2023-2024

Harley-Davidson

FXBR Breakout 117

Base

2018-2020

Harley-Davidson

FXBRS Breakout 114

Base

2019-2020

Harley-Davidson

FXDRS FXDR 114

Base

2018-2020

Harley-Davidson

FXFB Fat Bob 107

Base

2018-2023

Harley-Davidson

FXFBS Fat Bob 114

Base

2018,2020

Harley-Davidson

FXLR Low Rider 107

Base

2021

Harley-Davidson

FXLRS Low Rider S 114

Base

2022-2024

Harley-Davidson

FXLRS Low Rider S 117

Base

2022-2024

Harley-Davidson

FXLRST Low Rider ST 117

Base

2020-2024

Harley-Davidson

FXST Softail Standard 107

Base

## Details

- **Price:** 17855.18 CAD
- **Vendor:** S&S Cycle
- **Type:** Engines

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 17855.18 CAD | In stock |

## Images

- Photo - Primary

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-2018-oil-cooled-m8-softail-models-mk136b-black-edition-engine-w-475g-cam)
> Updated: 2026-07-13