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Metro Moulded Parts

Heater Box to firewall Gasket For GMC K15/K1500 Pickup 1967-1972; RP 300-T

Heater Box to firewall Gasket For GMC K15/K1500 Pickup 1967-1972; RP 300-T

Regular price $36.99 USD
Regular price Sale price $36.99 USD
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Designed for 1967-1972 Chevrolet and GMC Pickup Trucks, this heater box-to-firewall gasket ensures a precise fit with its 6-3/4" outer diameter and 4-3/4" inner diameter. Crafted by Metro Moulded Parts, this gasket is made using over 50 tons of pressure, delivering exceptional definition and detail for a snug and reliable seal. It is specifically engineered to prevent air and moisture leaks where the heater box meets the firewall, enhancing the efficiency of your vehicle's heating system. This gasket fits a wide range of models, including Chevrolet C10, C20, C30, K10, K20, and K30 trucks, as well as GMC C15/C1500, C25/C2500, C35/C3500, K15/K1500, K25/K2500, and K35/K3500 trucks from 1967 to 1972. Backed by Metro's 30-year warranty, this part offers long-lasting performance and peace of mind.

Features and Benefits

  • Provides a tight seal to prevent air and moisture leaks.
  • Enhances heating system efficiency by maintaining proper airflow.
  • Built with high-pressure molding for exact fit and durability.
  • Backed by a 30-year warranty for long-term reliability.


Warranty Info
Metro leading warranty is the best in the industy. This part carries our platinum warranty and is guaranteed for a full 30 years from date of purchase. We promise that if your Metro part fails during this time we will replace it free of charge. That is our "No Hassle" guarantee. Do not settle for a simple promise of satisfaction.


Convertible Top Specialists has been in business since 1992 selling the best in convertible related parts and weatherstripping for most cars' trucks and vans.

In stock items usually ship in 1 business day. Out of stock items please allow for 3-6 weeks.

Listed Applications
  • 1967 - 1972 Chevrolet C10 Pickup
  • 1967 - 1972 Chevrolet C20 Pickup
  • 1967 - 1972 Chevrolet C30 Pickup
  • 1967 - 1972 Chevrolet K10 Pickup
  • 1967 - 1972 Chevrolet K20 Pickup
  • 1968 - 1972 Chevrolet K30 Pickup
  • 1967 - 1972 GMC C15/C1500 Pickup
  • 1967 - 1972 GMC C25/C2500 Pickup
  • 1967 - 1972 GMC C35/C3500 Pickup
  • 1967 - 1972 GMC K15/K1500 Pickup
  • 1967 - 1972 GMC K25/K2500 Pickup
  • 1967 - 1967 GMC K35/K3500 PICKUP
  • 1968 - 1972 GMC K35/K3500 Pickup

RP 300-T

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