Depends on what year/application you're referring to...
The 1987 Trans Am didn't have a 455
Oldsmobile stopped production of the 455 in 1976. There were no 455s produced in 1987.
455 horsepower
A 1974 Oldsmobile 455 V8 has horsepower of 275 to 400. The Oldsmobile 455 was last produced in the year of 1975.
Around 200 net hp
There were 4 engines available in the Oldsmobile 455 4V, a 225, 250, 270 and 300 HP.
In 1969 ford made the boss 429, it came out with 360 horsepower stock, and 375 horsepower in race trim. All from the factory.
350,400 or 455
225 / 250 / 270 / 300 horsepower ( 4 versions of the Oldsmobile 455 - 4 barrel carburetor - listed in 1972 )
Horsepower TV - 2006 Building an Olds 455 was released on: USA: April 2009
225 horsepower - UA engine code or 250 horsepower - UD engine code
You need to specify which model Caterpillar motor you have. 455 is just a horsepower rating - several models were available with a 455 horsepower rating, to include the 3406B, 3406E, C12, C13, and C15.