Performance Eng GNHOR-THICK Thick O-Ring for Grand National Hub .139in

The Performance Engineering GNHOR-THICK is the thick-profile replacement O-ring designed specifically for use with PEM Grand National rear end hubs. With a cross-sectional thickness of .139 inches, this O-ring is the heavier of the two available Grand National hub O-ring options and is used where the thicker seal dimension is required for proper fit and function.

Key Features:

• Thickness: .139 in. cross-section (thick profile)
• Designed specifically for PEM Grand National hub assemblies
• Black rubber construction for durability and reliable sealing
• Direct OEM replacement — maintains proper hub seal integrity
• Compatible with 5 x 4.75 in. Grand National hub applications

This O-ring is a critical sealing component in PEM Grand National rear end hub assemblies used in oval track and dirt racing applications. Replacing worn or damaged O-rings helps prevent contamination and maintains proper axle and hub function. PEM part number GNHOR-THICK differentiates this thick-profile ring from the standard GNHOR.