which one would you guys reccommend? the DC and megan one look good, but the skunk 2 one looks good also

 

I recommend none, I made my own. I got a Hondata S100 which eliminates rear O2 and a tri y header which is too long anyway, so I welded some pipe on a flange and viola. Honestly it is piping, as long as there are no defects in the metal, they should all work exaclty the same, so long as they are not resonated, muffled, or bent. I belive they are all 2.5 in pieces of pipe with a two bolt flange on one side and a 3 bolt flange on the other.

 

Just get a normal exhaust pipe at Autozone and weld it in between, I'm sure those 3 test pipes you listed are the same design,which is just a pipe replacing the catalytic converter.

 

j's racing...

 

but really it's just a test pipe... they all work the same