Hi-Flo muffler not happy! Options

[bdog_v]

Well I just installed my magnaflow oval muffler 2.5" onto my 94 2.2 liter celica. First impression was I lost a fair amount of low end torque..... and its seems to rev up faster, but I want more economy than a race car.
-This is what my system composes of now:
1. Exhaust manifold to factory cat on manifold
*flex tubing was removed* as it was rotten and I just welded in a solid pipe
so now I get a little vibration at high revs not good gotta get a new flex pipe.
I couldn't believe how restrictive this piece was!!!! *But maybe this motor needs
some restriction?????
2. Stock size exhaust tubing
3. I kept the resonator muffler
4. After the resonator muffler I went to 2.25" tubing up and over the support beam
just like factory does.
5.then to 2.5" magnaflow oval muffler....
*Now the sound is slightly more aggressive but nothing shattering or even slightly attention grabbing.....
***THe real breaker in this deal is if my mileage dropped.... That can't happen I am thinking I should possibly try.
1. Removing the resonator muffler * to get a louder exhaust note
2. reinstall the factory muffler and smaller exhaust tubing to up the backpressure,
*Has anyone tried this idea as I wonder what it sounds like and does to the torque on take off??
Basically what I am after is louder exhaust but same factory torque down low......
THanks.....

[Blakout16]

shouldnt do anything to ur gas mileage....