Exhaust choices?

[Bmxr152]

I was wondering what would make the most power.
3 IN turbo back exhaust
Turndown after cat
Open downpipe

Bive me some suggestions please!!

 

[awdrst]

Open downpipe would be the best for performance. I would not go that route if i were you. Since you live in cali the smog guys will be all over you all the time. I would put on a 3" turbo back with a cat and a resonator and a muffler. This should keep things a resonable noise level and still give you a good performance gain.

 

[jccjr1982]

Plus the exhaust is also meant, and this isn't verbatim, but I did read something online along the lines... "to move gases from the front of the vehicle to the back of the vehicle, so fumes cannot reach the operator"