A 2" header will absolutely not hurt anything. Header theory goes out the window with a blower......the bigger the better....period.

 

Most people run meth on these or dual fue setups for big power. You can adjust SOI to help out a bit but I would run a HO pump and meth and should be fine 550 to tires.

I plan on pulleying down but i am out of fuel running e85 on stock setup, right around 450-475whp on big 33s.