Dorman Brass Pipe Plug 1/4" MNPT Hex Head for 1985-1993 Buick, 1984-1990 Chevrolet, 1984-1988 GMC, 1975-1993 Oldsmobile, 1976-1993 Pontiac 785-422D

Dorman Brass Pipe Plug 1/4" MNPT Hex Head for 1985-1993 Buick used to replace the original factory pipe plug and prevent leaks.

Built to meet the manufacturer’s design intent for reliable service.

Key Features

• 1/4" diameter with MNPT thread pitch
• Hex head for easy installation
• Corrosion-resistant brass construction
• Leak‑free performance validated through quality testing

Benefits

• Reliable seal to stop exhaust or brake line leaks
• Easy to install with standard tools
• Durable material resists corrosion over time
• Matches OEM fit and function for a seamless replacement

Application

This part is ideal for mechanics and DIY enthusiasts repairing exhaust or brake line pipe plugs on older Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models.

Fitment Notes

• 1985-1993 Buick, 1984-1990 Chevrolet, 1984-1988 GMC, 1975-1993 Oldsmobile, 1976-1993 Pontiac

Why Choose Dorman?

• Choosing Dorman aftermarket replacement parts is a smart way to restore your vehicle with confidence, thanks to a strong focus on fit, durability, and dependable performance. Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function, helping ensure a smoother installation and reliable results. Built with quality materials and validated through testing, they’re made to stand up to daily driving demands and help reduce the risk of repeat repairs. For a long-lasting fix you can trust, Dorman delivers proven aftermarket solutions that keep your vehicle operating the way it should.

What’s in the Box

• 1 PC

Item Dimensions

• 1.1in x 1.7in x 4.3in, 0.1lbs