Designed as an internal wear component of the standard Alpine® & TBP 4″ cylinder, the Piston Cup Backer plays a critical role in maintaining smooth, reliable operation. This bushing acts as a cushioning support for the piston cup, absorbing the stress of continuous cycling and helping extend the life of your cylinder.
Key Features:
Direct Fit: Compatible with standard Alpine® 4″ round body cylinders
Wear-Resistant: Designed to handle high-frequency use
Essential Rebuild Part: Replace during routine cylinder maintenance or rebuilds
Function: Supports and cushions piston cup for smoother operation and longer service life
A small part that makes a big difference—replace worn components before they cause bigger issues.
