MAS Chassis B5320 Suspension Ball Joint - Front Upper

Suspension Ball Joint Overview

MAS Chassis B5320 is a steel suspension ball joint built as a direct replacement for specific front upper applications. It is precision-engineered and rigorously tested to match the original equipment function on supported vehicles.

Key Features

• Steel construction with a rubber dust boot for durable service protection.
• Greaseable design with a zerk fitting for routine lubrication.
• Bolt-on mounting with four mounting holes for secure attachment.
• Includes a castle nut, cotter pin, bolts, and nuts for the listed application.
• Standard suspension grade with a tapered stud and metal bearing material.

Detailed Description

This MAS Chassis ball joint, part number B5320, is made for front upper suspension service on a range of Chevrolet, GMC, Oldsmobile, and Isuzu models. It is a fitment-based replacement for the Chevrolet S10, GMC Sonoma, and Chevrolet Blazer, along with related applications such as the GMC Jimmy and Oldsmobile Bravada. The greaseable design supports regular maintenance, while the steel body, rubber boot, and tapered stud help maintain consistent suspension articulation. This part cross-references MOOG Chassis Products K5320 and Mevotech Supreme MK5320 for the same application.

Common Replacement Uses

• Restoring worn suspension joint movement and steering response.
• Addressing looseness or play in the front upper suspension.
• Replacing a damaged dust boot or compromised joint housing.
• Correcting noise or clunking caused by joint wear.
• Servicing a greaseable joint that no longer holds lubrication properly.

Installation Notes and Tips

Confirm the vehicle year, make, model, and front upper position before ordering. The bolt-on design uses the specified mounting pattern and tapered stud, so the existing suspension layout must match the listed application. After installation, grease the joint through the zerk fitting according to service requirements and verify proper cotter pin engagement.

Quality Assurance

MAS Chassis states that this ball joint is precision-engineered and rigorously tested for reliable replacement performance on the specified vehicles.