2-1/2 Collecter Gasket 3-Hole

The 2-1/2 Collector Gasket 3-Hole is a precision exhaust manifold gasket engineered to seal the junction between an engine's exhaust manifold and cylinder head in applications requiring a three-bolt configuration. Built to OEM specifications, this gasket is essential for preventing exhaust leaks that compromise engine performance, fuel efficiency, and emission control. Whether you're performing routine maintenance, rebuilding an engine, or diagnosing exhaust noise, a properly seated collector gasket is non-negotiable for reliable operation.

Constructed with a steel core laminate core and precision-molded elastomer facing, the 2-1/2 Collector Gasket 3-Hole features a 0.063-inch thickness that balances conformability with durability under thermal cycling. The 2.5-inch diameter opening is sized for standard collector ports, while the three-hole bolt pattern ensures positive alignment and consistent clamping pressure across the gasket face. This steel-reinforced design resists blow-out under high-temperature exhaust conditions—critical in both stock and modified engine builds where manifold temperatures routinely exceed 800°F.

Technicians and enthusiasts rely on the TRANS-DAPT 2-1/2 Collector Gasket 3-Hole for Chevy small-block and comparable engine platforms requiring this bolt pattern. Installation is straightforward: ensure manifold surfaces are clean and smooth, position the gasket dry (without sealant unless manufacturer directs otherwise), and torque bolts to specification in a star pattern to avoid gasket migration. Sold individually, this gasket is a critical wear item—replace it whenever manifold bolts are disturbed or exhaust leaks develop.