Pro Design Cool Head Dome Standard Bore

The Pro Design Cool Head Dome (Standard Bore) is a replacement cylinder head dome insert for powersports engines. It lets you tune compression on a Pro Design Cool Head cylinder head. These domes are also called cool head domes, head dome inserts or replacement cool domes.

Key Features:

• CNC machined from billet aluminum for consistent quality and precise fit
• Interchangeable O-ringed domes let you adjust compression for fuel quality, elevation, timing or performance
• Better cooling efficiency than a conventional head design
• Standard bore design for engines running standard-bore cylinders
• Made in the USA by Pro Design

These domes only work with machines that already have Pro Design cylinder heads, which are sold separately. Choose the dome that matches your engine setup and compression goals.