WTF? My car is slower after exhaust..

[dL_RL]

Like the title says, my car feels slower after putting on my exhaust. It feels slower on the freeway and on the street. But it especially feels slow on the freeway. I don't know what the hell is going on, it started happening immediately right after I put the exhaust on.

here are the specs of my car and exhaust.

2004 Ion RL 10,500 miles
2.5 inch piping press bent
OBX-R Muffler

[dL_RL]

Oh yeah, just to add..

I dont have a resonator..
It feels like i've lost torque off the line. Not tons but definitely noticable.
It feels like i'm 2 cyclinders short on the freeway.

[pclear9061]

there could be somthing in the piping causeing alot of backpressure or it could be ....................

[dL_RL]

it almost feels like I have no back pressure....

I was thinking maybe I need that resonator back on my car for more backpressure..

correct? not correct?

[Raven]

your cat might be going out. what is press bent? mandrel or crush

[pclear9061]

yeah i was thinking that too but if you talk to some of the ppl here some have no res and still get the hp and everything ........

[matt]

Is it a straight through fart can? If so that's why.

[dL_RL]

i wouldnt say it's a fart can. But it is a straight through design.

[clownhair]

get it dynoed, could be in your mind man.

[zfactor]

crush bent is a no-no and you went up to 2.5 you are going to gain up top and loose down low that is physics when going to a larger diameter pipe, if you dyno the two that should be what you see. i also agree with poss the cat due to the flow difference now you will be passing more heat through it due to greater air flow. this can cause early cat failure i have seen it before especially on turbo cars