installing torque tech exhaust,should i go with test pipe or hiflo cat

[thutch]

i just got my exhaust today,torque tech 3inch dual exhaust'
should i go with hi-flo cat or test pipe.i got a catco hi flo cat.brought if of a guy who had a gn he was trying to restore and decided to part out,so i brought the exhaust.going to have it installed this weekend.should i
use the cat or go with a test pipe,got a deal on it.

 

[thutch]

i forgot the exhaust came with two chamber flomasters,i heard all the talk about the drone but i had flo's on all the
5.0's i had so i solved the drone with a nice stereo system,
but iam thinking of replacing the flo's with straight pipe and using the converter.