Cometic C5091-064 Armorcore Exhaust Manifold Gasket Set - .064 inch | 1999-2003 Ford F250/F350 7.3L Powerstroke

Features:

• Fits 1999–2003 Ford F250 to F550 7.3L
• Designed for 7.3L Powerstroke diesel engines
• .064 inch compressed gasket thickness
• ArmorCore construction for extreme durability
• 1.732 inch round port openings
• Seals against high temperature and pressure
• Reinforced with armor-clad and galvanized steel
• Graphite layer seals uneven mating surfaces
• Ideal for stock or performance exhaust setups
• Prevents exhaust leaks and gasket blowout
• Built for long-term diesel reliability

Stop Exhaust Leaks Before They Start With Proven ArmorCore Reliability

If you’re tired of chasing down stubborn exhaust leaks or replacing burnt-out gaskets that never seem to hold, the Cometic C5091-064 ArmorCore Exhaust Manifold Gasket Set is exactly what your 7.3L Powerstroke needs. Built specifically for 1999–2003 Ford F250 through F550 Super Duty trucks, this gasket set delivers a clean seal and consistent performance where it matters most. Whether you’re restoring a workhorse or upgrading your daily driver, this gasket helps you lock down the manifold with confidence and keep hot gases from sneaking out. With ArmorCore technology and a .064 inch compressed thickness, these gaskets handle the extreme heat and pressure of diesel exhaust without warping, cracking, or blowing out. The round 1.732 inch port design ensures proper fitment and smooth flow, whether you’re sticking with the stock manifold or installing a performance upgrade. It’s a simple install that makes a big difference in sound, performance, and long-term reliability. If you're pulling the manifolds, it’s the perfect time to seal it up right and skip the drama later on.

ArmorCore Layering Delivers A Durable Seal For Demanding Diesel Conditions

The Cometic C5091-064 Exhaust Manifold Gasket Set is engineered using the brand’s proprietary ArmorCore construction—a multi-material design that combines graphite, armor-clad steel, and galvanized layers to provide a resilient and thermally stable seal. Designed specifically for the 7.3L Powerstroke found in 1999–2003 Ford Super Duty platforms, this gasket features a .064 inch compressed thickness and round 1.732 inch ports for accurate alignment and exhaust flow retention. The ArmorCore layering allows the gasket to conform to minor imperfections in the mating surfaces of cylinder heads and exhaust manifolds, a common issue on older or heat-cycled engines. Graphite layers enhance flexibility and resistance to thermal expansion, while the steel cores provide rigidity and blowout resistance under high-pressure exhaust pulses. Whether you’re repairing a warped manifold or doing a fresh build, this gasket ensures consistent performance across temperature swings and load cycles. It’s a premium solution for both daily-driven trucks and high-mileage work applications where downtime from exhaust leaks simply isn’t an option.

Fits: 1999, 2000, 2001, 2002, 2003 Ford F250/F350 7.3L Powerstroke

Notes:

• Designed for 1999–2003 Ford F250, F350, F450, and F550 with the 7.3L Powerstroke diesel engine.
• Utilizes ArmorCore construction for enhanced durability and heat resistance.
• Compressed thickness of .064 inch ensures tight, secure fitment.
• 1.732 inch round port size matches factory manifold dimensions.
• Built to withstand extreme exhaust temperatures and pressure cycles.
• Ideal for both stock replacement and performance exhaust systems.
• Graphite and steel material blend allows for sealing on imperfect or warped surfaces.
• Recommended for long-term durability in high-mileage or heavy-use vehicles.
• Gasket set helps prevent exhaust leaks, soot buildup, and power loss.
• Professional installation is recommended for best sealing performance.