i just installed a hks carbon ti catback exhaust and i love it to death, the only thing is i know that i've lost a bit of bottom end, which is expected. i also think that i've lost some power up top as well, which may sound stupid, but i feel that it has. the area where i live has quite a bit of hills and this is when i feel it the most. before i installed the carbon ti, i used to fly up them hills in 5th like it was going out of style. now i gotta downshift to 4th to keep the momentum up.
now the car is a 2004 wrx w/ only 6k on the odometer. i havn't reset the ecu since the install, so could that be my problem? any help will be much appreciated...........