Description
Product Overview
The Biker’s Choice Breather Bolt Kit is engineered to deliver a precise fit and lasting durability for a range of Harley‑Davidson motorcycles, specifically the Twin Cam and Evolution Big Twin platforms. Each kit includes two high‑strength steel bolts and four precision‑machined washers, all finished with a corrosion‑resistant coating to withstand the harsh conditions of road and off‑road riding. The bolts are sized to match the original equipment specifications—3/8″‑16×1‑1/2″ for Twin Cam models and 1/2″‑13×1‑1/2″ for Evolution Big Twin—ensuring a seamless replacement without the need for additional modifications. The compact dimensions of the kit (approximately 3.5 x 3 x 1 inches) and lightweight design (6.9 ounces) make it easy to store and handle during installation. Designed with a painted exterior for added aesthetic appeal, this kit meets the rigorous standards of automotive performance and reliability.
![[Product front view showing all components]](https://www.assisttech.store/wp-content/uploads/2026/06/b44072e9611d4efba0ba30f05ed2fe38.jpg)
Usage
This breather bolt kit is ideal for both seasoned mechanics and motorcycle enthusiasts who perform routine maintenance or upgrades on their bikes. The kit is suited for use in a variety of environments, from a well‑equipped garage to a roadside workshop. Whether you are replacing worn bolts after a long ride, upgrading to a more robust component for high‑performance applications, or simply ensuring that your breather system maintains optimal airflow, this kit provides the necessary hardware to complete the job efficiently. The bolts and washers are compatible with standard Harley‑Davidson breather assemblies, making them a versatile choice for a wide range of models within the Twin Cam and Big Twin families. Installation requires basic hand tools, and the clear markings on each component help guide correct placement, reducing the risk of errors during the process.
Why Choose Us
Choosing Biker’s Choice means selecting a brand with a reputation for quality and precision engineering. Our breather bolt kits are manufactured using premium steel that undergoes heat treatment to achieve optimal tensile strength, ensuring that the bolts will not stretch or fail under pressure. Each component is inspected for dimensional accuracy, guaranteeing a perfect fit that mirrors OEM specifications. In addition to the robust construction, we provide comprehensive customer support, offering installation guidance, troubleshooting assistance, and a responsive warranty service. Our commitment to continuous improvement means that every kit reflects the latest advancements in material science and manufacturing techniques, delivering a product that not only meets but exceeds expectations for durability and performance.
Key Features
- Premium steel bolts with corrosion‑resistant coating for long‑lasting strength.
- Precision‑fit washers that create a secure seal and prevent air leaks.
- Exact OEM dimensions for Twin Cam (3/8″‑16×1‑1/2″) and Big Twin (1/2″‑13×1‑1/2″) models.
- Lightweight, compact design for easy handling and storage.
- Dedicated customer support and warranty for peace of mind.
FAQ
What motorcycles are compatible with this breather bolt kit?
The kit is designed for Harley‑Davidson Twin Cam and Evolution Big Twin motorcycles. It matches the factory bolt sizes for both platforms, ensuring a direct replacement without additional modifications.
Do I need special tools to install the kit?
No special tools are required. Standard hand tools such as a socket wrench and screwdriver are sufficient to install the bolts and washers. The kit includes clear markings to guide proper placement.
How does the corrosion‑resistant coating benefit the bolts?
The coating protects the steel from rust and environmental wear, extending the life of the bolts even when exposed to moisture, road salt, and varying temperatures.
Is there a warranty on this product?
Yes, Biker’s Choice offers a limited warranty that covers manufacturing defects. Our customer service team is available to assist with any issues that arise during the warranty period.
Can I use this kit for performance upgrades?
Absolutely. The high‑strength steel construction provides added durability for riders who demand higher performance or who frequently subject their motorcycles to demanding conditions.




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