Description
Product Overview
The ASTAMOTOR Truck Brake Valve is engineered from high‑density plastic with a polished chrome exterior, providing a lightweight yet durable solution for brake proportioning. Designed to replace part number 68345, it matches OEM standards and fits Peterbilt models 357, 378, 379, 385, 386, and 389 produced between 2006 and 2023. Dimensions are 6.89 x 5.91 x 1.97 inches, weighing just 4.8 ounces, making it easy to handle during service.
Usage
This valve is perfect for medium‑ and heavy‑duty trucks that require precise brake balance across multiple axles. Whether you are a fleet mechanic performing routine maintenance or an owner‑operator handling a quick repair, the snap‑in installation reduces downtime. It works in all standard brake systems that use a 1‑inch flare inlet and threaded outlet, ensuring seamless integration with existing hardware.

Why Choose Us
ASTAMOTOR combines advanced molding technology with rigorous quality testing to deliver a component that not only meets but often exceeds original equipment specifications. The chrome finish resists corrosion and simplifies cleaning, while the plastic core absorbs vibration, extending service life. Backed by a strong customer rating of 4.5 stars from 31 reviews, you can trust its performance on the road.
Key Features
- Exact OEM replacement for part 68345, ensuring perfect fit.
- Durable plastic body with a corrosion‑resistant chrome exterior.
- Snap‑in installation saves time and eliminates the need for special tools.
- Compatible with 2006‑2023 Peterbilt models 357, 378, 379, 385, 386, 389.
- Meets OEM specifications for brake proportioning and safety.
FAQ
Is this valve compatible with older Peterbilt trucks?
Yes, the valve fits Peterbilt models from 2006 through 2023, covering a wide range of production years.
Do I need any special tools to install the valve?
No special tools are required. The valve features a snap‑in design that allows quick installation in just a few minutes.
What is the inlet connection size?
The inlet connection is a 1‑inch flare type, matching standard brake system fittings.
Can this valve be used on non‑Peterbilt trucks?
While it is engineered for specific Peterbilt models, it may fit other trucks with identical brake system specifications. Verify your vehicle’s inlet and outlet types before purchase.
What warranty does ASTAMOTOR provide?
ASTAMOTOR offers a limited one‑year warranty covering manufacturing defects, ensuring peace of mind for your investment.




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