^x2 on this

 

im considering the Magnafuel 750 external... anyone had any experience with them?

 

I have only ever heard good things about them. Never heard anything bad about them.

 

Where did you get the 255's? There are a lot of knockoffs out there that don't flow what the real ones do. Also you never answered how you had them mounted (inline or in parallel) There is no way that a pair of 255's should be maxed out at 800 hp on gasoline.