I plan on buying Arata Titanium Full Race Exhaust. Can the exhaust just be put on and go...or do I need to take it somewhere for them to re tune it or something? also is anyone sure if there is a nut on there to screw in the oxygen sensor?

 

you'll need to get it tuned for it to run optimally. if you're shelling out that much bling, do it right so you get all the gains...otherwise, there's really no point in getting the full system.

as far as the O2 sensor if there isn't one, you can also tap the midpipe and weld one on there (which i recommend) or run the O2 simulator.