Thrashin Supply Co. Black/Twice-Cut Front Brake Master Cylinder Cover for Harley-Davidson Softail Models

Upgrade your Harley-Davidson® controls with the Thrashin Supply Co. Black/Twice-Cut Front Brake Master Cylinder Cover, engineered for riders who want performance-level precision with custom style.

Machined from 6061 aircraft-grade aluminum, this high-quality cover delivers the perfect mix of durability and refined design. The Twice-Cut finish features a black anodized surface accented by machined aluminum highlights — giving your controls an aggressive, contrast-cut look that pairs perfectly with modern Softail styling.

Installation is quick and easy, using the factory OEM gasket and the included hardware for a perfect, leak-free fit. Proudly made in the USA, this cover is built to last and look great ride after ride.

Key Features

• CNC-Machined Aluminum: Constructed from premium 6061 aircraft-grade aluminum for superior strength and fit.

• Twice-Cut Design: Striking black anodized finish with precision-machined aluminum accents for a performance-inspired look.

• Simple Installation: Includes mounting hardware and reuses your OEM gasket.

• Custom Fit: Designed for late-model Harley-Davidson Softail front brake master cylinders.

• Made in the USA: Engineered and produced with precision American craftsmanship.

Fitment – Harley-Davidson Models

Fits the following Harley-Davidson® Softail models:

• 2025 FXBR Softail Breakout

• 2025 FXBB Street Bob 117

• 2023–2025 FXBR Breakout 117

• 2022–2025 FXLRS Low Rider S 117

• 2022–2025 FXLRST Low Rider ST 117

• 2022, 2025 FXBB Softail Street Bob

• 2021–2024 FXBBS Street Bob 114

• 2020–2021 FXLRS Low Rider S 114

• 2018–2023 FXFBS Fat Bob 114

• 2018–2021 FLSL Softail Slim 107

• 2018–2020 FXBB Street Bob 107

• 2018–2020 FXBRS Breakout 114

• 2018–2020 FXLR Low Rider 107

• 2018–2019 FXFB Fat Bob 107

• 2018–2019 FXBR Breakout 107

Fitment based on stock configurations. Aftermarket controls or handlebar changes may impact compatibility.

Technical Specifications

• Product Name: Master Cylinder Cover

• Brand: Thrashin Supply Co.

• Type: Front Brake Reservoir Cap

• Material: 6061 Aircraft-Grade Aluminum

• Finish: Black / Twice-Cut (Polished Contrast Cut)

• Mounting Style: Bolt-On (Hardware Included)

• Compatibility: Reuses OEM Gasket

• Units: Kit

• Riding Style: Street / Cruiser / Softail

• Made in: USA