muffler
 

i have a borla muffler sitting in my livivng room and i cant decide how to mount it in. its a 2.5 dual in/dual out.
i bought it so could have a good tone thats not too loud, but if i can get a lil torque or hp i will try of course.
should i weld in stock oem location and exit one pipe? im assuming this will keep my torque the same and not raise hp?
or should i run 2 pipes out? im thinking this will raise hp a couple points but i will lose some torque?

my only performance mods i plan on are this muffler and a jet chip 1.