compared to what? a stock 7.3? and if they are EFI live tuned they are pretty sick. but i would try racing one with the set up in your sig. 
Duramax??
Are they really that fast?
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They aren't slow tunedAre they really that fast?
I was just wondering if i was missing something. Ive rode in a few and none have pulled as hard as my 6.0. But all i keep hearing from everyone is how sick and fast they are. I dont understand.
They are Japanese (Made by Isuzu). Speed is all they do good.
Travis
Travis
It's just like any vehicle, depends on the setup. With the right tunes and trans, they can make great power (up to low 500's). They are also hundreds of pounds lighter than the Super Duty...
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