1. 

   Regal-Luvr Well-Known Member

   I was just wondering at what horsepower level does a 455 need a block girdle?

    

   Regal-Luvr, Nov 23, 2003

   #1
2. 

   rh455 Well-Known Member

   I'd say around 600 to 650. There are several people on the board with over 650 not running one. I guess it all depends on the block you pick, but then again, that's a guessing game in itself.

    

   rh455, Nov 24, 2003

   #2

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