This is what Autozone says, so i think you gotta go to the dealer.

Home > Shopping > Pre Part Type Selected > Parts Results CATALYTIC CONVERTERBOSAL CATALYTIC CONVERTER for a 1998 HONDA PRELUDE
Unit Price: $0.00Core Value*: $0.00Part No.: CC3-006Weight: 0.00 lbs.Warranty: 0 YRAvailability: Online: Not Available Store: Not Available Note:
***VERIFY THE UNDER-HOOD FEDERAL///CALIFORNIA EMISSIONS LABEL PRIOR TO PROCEEDING*** THIS CATALYTIC CONVERTER IS FOR USE ON FEDERAL EMISSIONS EQUIPPED VEHICLES ONLY AND MUST NOT BE USED ON CALIFORNIA EMISSIONS EQUIPPED VEHICLES. ************************************************** **** THE O.E. MANUFACTURER WARRANTIES FAILED CATALYTIC CONVERTERS AS FOLLOWS: VEHICLES MANUFACTURED PRIOR TO 1995 CARRY A 5-YEAR OR 50,000 MILE WARRANTY. VEHICLES MANUFACTURED FROM 1995 CARRY A 8-YEAR OR 80,000 MILE WARRANTY. FAILED CONVERTERS DURING THIS WARRANTY PERIOD MUST BE REPLACED WITH AN OEM CATALYTIC CONVERTER. PLEASE REFER TO YOUR OWNERS MANUAL FOR FURTHER DETAILS