So raced against a 04 duramax 4 door 4 wheel drive like mine. He has a built trans and lift pump and turbo. Dyno made 540hp.
I have 64mm street max , s&b intake. 4 " downpipe and Morgans tunes.
We did a boosted launch at 30mph, I held him for first bit, but on the top end he pasted me... And he...