How are you able to keep upping the hp amount? How do you keep getting the extra N2O and required fuel into the cylinders?

Another 120hp in my 500E sounds attractive!

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David Hendy
'97 Renntech E60RS
'97 GMC 2500 Sub' Diesel
'95 E300D
'88 300TE
'88 250TD
'84 L/Rover 109