i just put a new piping kit (and it cant use the stock air box )on my 03 evo and ganed 10 hp but lossed 2600 rpm in spool up i have a 2.3 stroker fully done no cams green 20g and lighted flywheel full race ex. what is going on it seams every time i put a cold air intake this happens anyone know why is it the mass air flow ?????????????
