It worked wonders on my 450. It is the best "performance chip" I ever bought ($279.00). You are suppose to leave it in for about a month and it fashions your driving style, definitely takes away that ~sometimes drive by wire pause, and makes the shifts more positive whether you are in automatic mode or manual mode. If you want to try it in your 451, you have nothing to loose for $20 that includes shipping.
You may contact me directly at [email protected]
Thanks, sykes05
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