Description
Product Overview
The Chrome Motorcycle Head Breather Bolts kit from YDLMT is engineered to address the common venting challenges faced by Harley‑Davidson owners when upgrading to aftermarket air cleaners. Each bolt is machined from high‑grade aluminum, offering a perfect balance of strength and corrosion resistance while keeping weight to a minimum. The thread specification of 3/8‑16 by 5/8 ensures a secure fit on the crankcase vent ports of twin‑cam engines spanning model years 1994 through 2014, covering Dyna, Softail, CVO, and Touring families. Included in the package are two polyurethane filter sponges that sit within the screw heads, providing an additional layer of filtration to capture fine particles and maintain optimal airflow. The package dimensions of 6.89 x 4.72 x 0.98 inches and a weight of just 0.8 ounces make storage and handling effortless. Designed for both EFI and carbureted configurations, the kit delivers a clean, leak‑free solution that supports engine performance and longevity.
![[Product front view showing all components]](https://www.assisttech.store/wp-content/uploads/2026/07/fa483454a6924b51b46431c42170bce4.jpg)
Usage
These breather bolts are ideal for riders who demand reliable performance on daily commutes, long highway rides, and spirited weekend runs. By installing the YDLMT breather bolts, riders can eliminate the common issue of oil vapor escaping into the intake system, which can cause fouled spark plugs and reduced fuel efficiency. The kit is especially beneficial for those who have installed high‑flow air filters or custom intake systems, as the enhanced venting capacity helps maintain proper crankcase pressure. Whether you are a seasoned Harley enthusiast or a newcomer looking to upgrade your bike’s intake, the bolts are straightforward to install with basic hand tools, making them suitable for DIY mechanics and professional shops alike. The inclusion of filter sponges also means you can replace or upgrade the filtration media without having to purchase additional components, extending the life of the kit.
Why Choose Us
YDLMT stands out in the powersports aftermarket by combining meticulous engineering with responsive customer support. Each breather bolt undergoes a rigorous quality‑control process that includes dimensional verification, thread integrity testing, and corrosion resistance assessment. The aluminum construction is anodized to further protect against the harsh elements encountered on the road, from rain to road salt. Our 30‑day warranty and 24‑hour customer service guarantee that any installation concerns or product defects are addressed promptly, giving you confidence in your purchase. Additionally, the design of the bolt head aligns with the original OEM specifications, ensuring a seamless aesthetic integration that preserves the classic look of your Harley while delivering modern performance benefits.
Key Features
- Precision‑machined aluminum bolts provide durable, lightweight venting solutions.
- 3/8‑16 thread size matches OEM specifications for a perfect fit on twin‑cam engines.
- Includes two polyurethane filter sponges for enhanced airflow cleanliness.
- Compatible with both EFI and carbureted Harley models from 1994‑2014.
- Backed by 30‑day warranty and 24‑hour customer support for peace of mind.
FAQ
Do these breather bolts fit my 2005 Softail?
Yes. The 3/8‑16 thread and overall dimensions are designed to match the vent ports on all Softail models produced between 1994 and 2014, including the 2005 year.
Can I use the kit with a high‑flow air filter?
Absolutely. The kit’s design accommodates increased airflow while the included filter sponges help capture any additional particles, ensuring the engine stays protected.
What tools are required for installation?
Installation typically requires a standard socket set or a wrench that fits the bolt head, along with a screwdriver to secure the filter sponge if needed. No specialized tools are necessary.
Is the aluminum coating resistant to road salt?
The bolts are anodized, which provides an extra layer of protection against corrosion caused by road salt and moisture, extending the lifespan of the product.
What is the warranty policy?
YDLMT offers a 30‑day warranty covering any manufacturing defects, and our customer service team is available 24 hours a day to assist with installation questions or concerns.






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