Dorman Autograde Steel Cup Engine Expansion Plug 41.5mm for 1977-2005 Vehicles 555-087

Steel cup engine expansion plug 41.5mm for 1977 to 2005 vehicles used to replace worn or leaking factory core plugs.

Built to meet the manufacturer's design intent for reliable service, this plug is constructed from durable steel to withstand engine pressures and prevent coolant leaks.

Key Features

• Constructed from high-quality steel for long-lasting durability
• Precise 41.5mm diameter with 0.536 inch height
• Engineered to match original equipment form and fit
• Sold as a convenient 10-piece pack for multiple replacements
• Validated through testing to ensure dependable performance

Benefits

• Restores engine sealing to prevent dangerous coolant leaks
• Direct fit design simplifies installation and reduces labor time
• High-quality materials reduce the risk of repeat repairs
• Bulk pack provides value for comprehensive engine maintenance
• Backed by over a century of automotive expertise

Application

Ideal for mechanics and DIY enthusiasts repairing cooling system leaks on compatible General Motors, Mitsubishi, and American Motors engines from model years 1977 through 2005.

Fitment Notes

• Compatible with select 1977-2005 vehicle models
• Replaces part numbers including GM 838538, MD096863, and Pioneer EPC149-10
• Verify specific engine application before purchase

Why Choose Dorman - Autograde?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
• Built with quality materials and validated through testing to stand up to daily driving demands
• Offers a smart way to restore your vehicle with confidence in fit and durability

What's in the Box

• 10 Piece set of steel cup expansion plugs

Item Dimensions

• 4.9 inches x 3.6 inches x 2.2 inches
• Weight: 0.9 lbs