Definately an Akrapovic full exhaust system with a Carbon Fiber cannister.
The RACE system has a Stainless Steel header. The EVO system has a Titanium header. The RACE sells for $1,200 new. The EVO lists for over $2,000 and weighs less than 7 pounds total. Akrapovic makes a decibel reducer that fits into the end of the cannister.
I have the EVO on my 2008 ZX14. With a PC3 and custom dyno tune, mine makes 190 rwhp on the local dyno. All the dyno graphs I have seen show that the Akrapovic EVO makes the most midrange power of any aftermarket exhaust.
When I purchased my Akrapovic EVO, it came with the O2 bung welded onto the pipe. I am not using an O2 sensor, so I inserted the supplied plug from Akrapovic to plug it off.
* Last updated by: zxrider11 on 2/4/2015 @ 3:52 PM *
2008 ZX14
2012 KTM 690 Enduro R