HKS 31021-BH004 is the LEGAMAX Premium exhaust for the manufacturer-listed Civic FC1 sedan with the L15B engine, with the application chart beginning in 2016.
The system uses S304 stainless-steel main construction and titanium tips. HKS specifies 75mm tips and a 60mm main pipe with 50mm sections. It is not an all-titanium exhaust.
Confirm the exact chassis, engine, vehicle market and mounting arrangement before ordering. The FC1 listing does not establish compatibility with coupe, hatchback or other engine configurations. Manufacturer performance and ground-clearance figures depend on the tested vehicle setup.
