Well i just installed a reative muffler about 2 weeks ago on my 91 accord ex-r. Under the hood i have a reative intake and my car is automatic. i notice that i lost power because my acceleration is very slow. i tried putting on the silencer and it gave me some power back but i would like to keep the loud sound coming from the muffler. i think this has to do something about the back pressure because i reset the ecu and there was no differences. please help.