i have only heard of J's N1 exhaust being used. is there a reason why the RR and RS exhaust are not popular? from what i have read the N1 provides the least PS(or hp?) out of the 3.

Thanx

"Motorbreath is how I live my Life"

 

the other two are competition only exhausts - they're LOUD.

 

I think one of them has one muffler and the other has NONE

 

is absolutely correct.

if you can stand the noise, by all means.

 

This was a good question, I have also wondered the same thing. Thanks.