1. 

   thebuick Well-Known Member

   Good morning all.Can anyone tell me the horse power options the 73 Riv GS 455 put out I know there were a few different 455's for that car.thank u

    

   thebuick, Nov 11, 2014

   #1
2. 

   LARRY70GS a.k.a. "THE WIZARD" Staff Member

   Some of the Rivieras got the Stage1 heads. The standard 455 that year put out 250 HP/375 TQ. The GS455 Stage1 put out 260HP/380 TQ, and the Stage1 in the Riviera was rated at 270 HP/390 TQ.

    

   LARRY70GS, Nov 11, 2014

   #2
3. 

   thebuick Well-Known Member

   Thank you Larry

    

   thebuick, Nov 11, 2014

   #3

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