AP EXHAUST - FLEX TUBE  - Model - F13404B   - Old Model FT175B4

NEW - NEVER been installed just old stock. 

Diameter at the opening  1-3/4"  

Height from end to end  4" 

AP Exhaust flex couplings are stainless steel expansion joints designed for engine exhaust. They're constructed with 2-ply bellows and designed with a seamless, convoluted inner core—increasing flexibility in order to reduce vibrations and prevent exhaust leaks.