DAmn it I am getting too many stories on which one to get. Some say that 8.1 are big enough and some are saying they don't have a good enough flow rate? Any help here would be great.

 

I'd get at least the 8.1 marine 43 lb'ers.

 

The 8.1 direct fit 43#ers will be ok. Depending on how hard you push them they can technically get you 600+ flywheel hp.

At 80% duty cycle and .5 BSFC they should be good for 550 flywheel hp. I'd imagine a 422 will be close +/- to that output.

 

Any brand I should stick with? Am i going to sink a ton in these?