Like the title says. looking for something more straight through than the stock 2.25 wrx and sti midpipe i got sitting around.
This will mate from a cobb dp to a sti axle back

 

hey bro, i had the same situation...went to west coast mufflers in concord and the guy made me a real nice 2.5 straight thru pipe for $100. its even got a collector flange on the front so its a real smooth transition from 3" to 2.5".

my $.02

 

^ yeah you can get one fab'd up at a muffler shop.

Mad Dad SCP also makes a midpipe that would solve your problem. it connects to a 3" aftermarket downpipe and tapers down to 2.5" in order to mate with any oem axle back. this might offer better flow because its a smooth taper down the entire length of the pipe, instead of an abrupt 2.5" flange at the end of the pipe, which may cause turbulence and disrupt flow.

http://www.daddysscp.com/dcart4/prod...&cat=17&page=1

 

Its close to 300 shipped...wow but looks like a solid piece though like most folks say.

 

Was thinking about doing that. I got a spare midpipe was going to see if i could get a shop to just delete the resonator.

How does it sound? thing i worry about is that i will have just a unrefined boxer rumble which i would hate. Just not what i want my car to sound like.

Thanks for the info though ill be sure to give em a call

 

was thinking about this too but it doesnt mate to a donut dp.