X4XZ Bonnet Latch Kit LH/RH for Peterbilt 579 & 337 — Heavy-Duty Direct-Fit, Corrosion-Resistant

This pair of hood latches from X4XZ replaces OE# 315-5502 and OE# 315-5503 and is built to return worn or damaged hood catches to reliable service. Supplied as a two-piece kit with a 12-month warranty, the units are molded from durable plastic and rubber with a corrosion-resistant shell to resist road conditions. They are engineered to be installed without specialty tools and work on a wide range of heavy trucks and buses so you can complete service quickly.

Which vehicles does this hood latch kit fit?

These latches are compatible with many Peterbilt, Kenworth, Mack and Blue Bird Vision models. Check your vehicle model and year against the fit list before ordering to ensure correct replacement.

• Peterbilt: 325, 335, 337, 340, 348, 384, 386, 567, 569, 579
• Kenworth: T170, T270, T300, T370, T440, T470, T660
• Mack: CH612, CH613, Granite CTP713/GU813, LEU613, Titan, Vision CX612/CX613
• Blue Bird Vision: 2009–2015 models; Mack CH 2002–2003

How easy is installation and what tools are needed?

The kit is made for direct replacement and generally requires no specialized tools, so technicians and experienced DIYers can install it quickly. Standard hand tools are typically sufficient, and the latch geometry matches OEM mounting points.

• Direct-fit design replaces OE# 315-5502/315-5503 without modification
• Common hand tools (screwdrivers, socket set) suffice for removal and fitment
• No special alignment equipment required for standard hood latch mounting
• Refer to vehicle service manual for exact torque specs and safety steps

What are the build materials and durability features?

Constructed from hardened plastic and rubber with a corrosion-resistant outer shell, these latches are designed to tolerate frequent use and exposure to road salt, grime and vibration. The materials allow for flexibility under load without cracking, while the exterior finish reduces corrosion-related failures.

• Top-grade plastic and rubber components for toughness and flexibility
• Corrosion-resistant shell for longer life in harsh conditions
• Designed to pull at large angles without breaking
• Manufactured to meet common OEM fit and function requirements

Will replacing these latches reduce hood noise and safety risks?

Yes—aging or damaged latches can cause hood rattles, unintended openings and increased cabin noise. Installing a fresh, correctly fitted latch restores secure engagement and reduces both noise and the chance of accidental hood release while driving.

• Restores secure hood closure and reduces rattle noise
• Lower chance of accidental hood opening while on the road
• Improves overall vehicle safety and driver confidence
• Backed by a 12-month product warranty and customer support

Who is this for: The X4XZ 315-5502 & 315-5503 heavy duty hood latch kit is intended for fleet managers, truck technicians and owner-operators who need a reliable OEM-compatible replacement for worn hood latches on Peterbilt, Kenworth, Mack and Blue Bird Vision vehicles. It's also suitable for maintenance shops that want a straightforward, cost-effective part to restore hood security and reduce cabin noise, with the convenience of direct-fit installation and one-year coverage.