The custom/aftermarket exhaust thread! [Pics + Videos]

[mrbond]

Originally Posted by 2DtheDon

Sorry for this noob quesiton but whats the difference between the catback and the axle back?and is it true that the axle back has no increase on the HP?

It's not necessarily true that an axle-back won't increase horsepower. It depends on how restrictive it is and/or the baffling design. It is mainly for sound, however, due to the design of the Yaris exhaust system, that's the only thing you can change other than getting a whole midpipe. A catback system goes from the catalytic converter all the way to the tip, and will result in a higher hp gain.
Hope that helps.