1978-1980 Monte Carlo Quarter Window Lower Horizontal Seal Set with 1/4″ inch stainless steel bead

Overview

A lower horizontal seal set designed for the 1978-1980 Monte Carlo quarter window, featuring the correct 1/4-inch stainless steel bead trim detail.

Key Features

• Correct application for the 1978-1980 Monte Carlo quarter window
• Features the factory-style 1/4-inch stainless steel bead
• Pairs with the vertical seal set for a complete weatherproof system

Benefits

Getting the correct bead style matters — Monte Carlo quarter window seals were offered with different trim bead widths, and this stainless steel bead version is the correct match for certain trim configurations, helping keep water and noise out.

Vehicle Compatibility

Correct application for the 1978-1980 Monte Carlo quarter window with the 1/4-inch stainless steel bead style. A separate 1.5-inch diecast aluminum molding version is also available — please verify which bead style your car uses before purchasing.

Common Signs This Part Needs Replacement

• Water leaking in around the quarter window
• Increased wind noise at speed
• Cracked, hardened, or shrinking seal material

Installation Notes

Installs into the factory quarter window channel alongside the vertical seal set. Confirm your correct bead style before ordering to avoid a mismatch.

Why Buy From Mr Keith’s Auto Parts

We stock both bead styles for this seal because ordering the wrong one is a common and easy mistake — we can help confirm which one matches your Monte Carlo.

Technical Specifications

• Manufacturer: Verify before purchase
• OEM Number: Verify before purchase
• Part Number: Verify before purchase
• Material: Rubber seal with 1/4″ stainless steel bead
• Position: Quarter window, lower horizontal seal
• Color: Black rubber with stainless bead
• Category: Monte Carlo / Weather Stripping and Seals
• SKU / WooCommerce ID: 2390
• Vehicle Compatibility: 1978, 1979, 1980 Monte Carlo, stainless steel bead style

FAQs

What’s the difference between this and the 1.5-inch diecast aluminum molding version? This version uses a 1/4-inch stainless steel bead trim detail; the other listing uses a wider 1.5-inch diecast aluminum molding. They’re not interchangeable — verify which your car uses.

Do I need the vertical seal set too? Yes, for a complete quarter window reseal, pair this with our matching vertical seal set.

Can I install this myself? Yes, it installs into the factory window channel, though care should be taken to match the correct bead style first.

What are signs I need to replace this seal? Water leaks, wind noise, or visibly cracked/hardened rubber are the main indicators.

Will this fit a 1981 Monte Carlo? This listing covers 1978-1980 only — verify compatibility with us for other years.

How do I know which bead style my Monte Carlo has? Compare your existing seal’s trim detail against reference photos, or contact us for help identifying it.