Posted December 11, 2009 11:38 AM Hi,i own a seadoo rxp 07 155hp,and i instaled riva intake grate,solas impeller 11/19,riva pump wedge,rd air filter,and get rid of the resonator by installing an inox pipe.Now i m thinking to change the plastic pump into an aluminium.I would like to know if i have to swap to another impeller for exaple an 12/20 in order to reclaim the total tuning by improving accelaration and top end