Thisis an original NOS/OEM Exhaust Resonator for 1966-1970 Pontiac Catalinaand Grand Prix.  
Original part number in the 69 Pontiac Master Parts book:9784753 
Part was superseded in the 71 Pontiac Master Parts Book to partnumber: 9798281 

Resonator is in excellent condition. Never used or installed.  Has been in storage for years. 
Note: Resonator is NOS but likely an OEM aftermarket part without thebox.

Fitsthe following applications:
66-70, 52 series (Catalina), 2bl, 3 SP/MT with Single Exhaust, exc SW
66-68, 52/66 series (Catalina/Grand Prix) 2bl, 4bl, with Duel Exhaust, excHO/SW
69-70, 52 series (Catalina), All, with Duel Exhaust, ex HO/SW

Ihave several of these resonators with the same part number, please see my otherauctions.
Multiple items can be combined to save on shipping cost if more than oneauction is won.
Returns not accepted.