What makes the cylinder heads on this engine different from stock?

The high-flow cylinder heads are cast from a high-strength alloy for better performance at high temperatures. They also feature +1mm oversized intake and exhaust valves, which are .030 inches longer than stock to improve valvetrain geometry.

Is this engine compatible with all 2018+ M8 Softail models?

This engine is designed for 2018 and later Oil Cooled M8 Softail models. It is not CARB approved and cannot be shipped to California.

What is included with this engine package?

This is a complete crate engine package. It includes the MKB-Series crankcases, 136 cubic inch cylinders and flywheels, high-flow cylinder heads with oversized valves and springs, billet aluminum covers, and a sprocket shaft spacer.

Specifications

Brand: S&S Cycle
Part #: 310-1295
UPC: 310-1295

S&S Cycle 2018+ Oil Cooled M8 Softail Models MK136B Black Edition Engine w/ 550G Cam

Name: S&S Cycle 2018+ Oil Cooled M8 Softail Models MK136B Black Edition Engine w/ 550G Cam
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-2018-oil-cooled-m8-softail-models-mk136b-black-edition-engin-t14-887236
Price: 13978.89 USD
Availability: BackOrder

$13978.89

On Backorder

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

S&S Cycle MK136B Black Edition Engine for 2018+ Oil Cooled M8 Softail Models. Get the largest, most powerful, and most reliable crate engine.

Key Features

Fits 2018+ Oil Cooled M8 Softail Models.
136 cubic inch displacement.
High-flow cylinder heads cast from a high-strength alloy for improved strength at high temperatures.
Features +1mm oversized intake and exhaust valves that are .030 inches longer than stock for improved valvetrain geometry.
Equipped with .605 inch max lift valve springs and premium seats, guides, valves, and seals.
Includes billet aluminum covers and a sprocket shaft spacer.

This engine is designed for 2018 and later Harley-Davidson Oil Cooled M8 Softail models. It is not CARB approved and cannot be shipped to California.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

S&S Cycle is well-known for building powerful and reliable crate engines that offer a significant step up from stock. This MK136B Black Edition engine is their latest offering for 2018 and later Harley-Davidson M8 Softail models, designed to be a direct replacement for your existing engine. It's built to give you the largest, most powerful, and most reliable engine available for these bikes.

At its core, this engine uses S&S's MKB-Series crankcases paired with 136 cubic inch cylinders and flywheels. To maximize airflow and performance, it features high-flow cylinder heads. These heads are cast from a high-strength alloy that holds up better under high temperatures, and they come equipped with +1mm oversized intake and exhaust valves, which are .030 inches longer than stock to improve valvetrain geometry. The engine also includes .605 inch max lift valve springs and premium seats, guides, valves, and seals. Billet aluminum covers add a touch of style and durability.

This is a complete engine package ready for installation, though it's important to note that it is intended for race use only and is not street legal. It also cannot be shipped to California due to CARB regulations. A sprocket shaft spacer is included to aid in installation.