I installed magnaflow 14859 muffler a couple days ago. Bought it out of randomness and now i feel like its not loud enough for me. My question is does 14859 has resonator in it or not. If yes, can I remove it somehow? and finally does resonator reduces cabin noise and outside noise? as in if i remove it, both cabin noise and outside will be louder

 

On the resonator question, the resonator eliminates a certain low frequency (exhaust noise) and limits annoying cabin droning and lowers overal decibal loudness of the exhaust system. Taking away a resonator will not noticably increase power, but will definitely increase loudness and cabin drone.

I had a friend in a lancer that has Greddy Ti-C exhaust and he cut away his resonator. Says sounded a lot nicer outside the car (exhaust) but inside city driving his ears hurt and increased droning.

He put back the resonator the next day.

 

Can i put alternative resonator so it'll be slightly louder but not as loud as no resonator?

 

I believe there are 2 resonators below the lancer and both are fairly small. You should be able to get away with removing one to increase loudness. Any replacement resonator is likely to be more sound absorbing than the flimsy stock resonators.

If your not droning in the cabin you can get away with it. If you are like my friend with the Ti-C and get cabin drone, it will only make it worse.

If you have no cabin drone and can live with slightly louder inside the cabin exhaust noise, go ahead.