Cometic C9788 HD 1340 Cylinder Base Gasket 3.8125" Bore .016" Copper Pair

The Cometic C9788 heavy-duty cylinder base gasket is engineered for Harley-Davidson 1340cc Evolution engines with a 3-13/16" (3.8125") bore. This premium gasket set includes one pair of .016" thick copper base gaskets designed to provide superior sealing and heat dissipation in high-performance applications.

Key Features:

• Precision-cut copper construction for excellent thermal conductivity and conformability
• 3-13/16" (3.8125") bore diameter for 1340cc Harley-Davidson Evolution engines
• .016" thickness for precise deck height control and compression tuning
• Heavy-duty design withstands high cylinder pressures and extreme temperatures
• Sold as a pair for complete cylinder base sealing
• Made in the USA with Cometic's renowned gasket manufacturing quality

Cometic copper base gaskets are ideal for performance builds, custom applications, and engines requiring precise compression ratio adjustment. The soft copper material embeds into minor surface imperfections for a reliable, leak-free seal.