Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.422in O/A Length, 0.3415in Stem

Manley Performance is well-known for making strong internal engine components, especially for high-performance and racing applications. This kit features their Extreme Duty Series exhaust valves, designed for the toughest jobs out there. If you're building a Big Block Chevy for marine use, or pushing the limits in Top Fuel or Funny Car drag racing, these valves are built to handle extreme force and heat.

The heart of these valves is Manley's XH-432 XtremeAlloy material, which is specifically chosen for its ability to withstand high temperatures and stresses. They also feature chrome stems and hard tips, adding to their longevity and resistance to wear, which is crucial in high-performance engines. You'll also find swirl polished under-head areas and fully machined combustion faces. This design helps improve airflow into the cylinder and can contribute to more efficient combustion, making the most of your engine's power potential.

This kit includes eight exhaust valves, each measuring 1.880 inches across the head and 5.422 inches overall in length, with a 0.3415-inch stem diameter. These are designed as direct replacements for specific Big Block Chevy applications where durability and performance under extreme conditions are paramount. When rebuilding or modifying your engine for demanding use, these valves offer a well-built solution from a trusted name in performance parts.