Hello all,

http://www.hondapower.net/s2000/motor/motortuning.htm

in this link there is a pic of the supersprint exhaust, there are two options for the system, one is straight through and the other has an extra box in it.
If this system is from the cat back, why does it need an extra cat type box?
Sorry if i'm being really stupid here?
Many thanks
steve

 

The optional box is a primary muffler. The straight through system would be very loud and not legal for street use.

 

thankyou
Steve