Well what's intriguing right now is it's a pretty good deal on a full kit, with some nice upgrades to the pipe diameter, the routing, etc. Speaking of the EMS Powered one specifically. the second is they are coming out with a Turbo kit- in which case a new exhaust is almost a requirement. And thirdly, it's about $600, shipped- which as far as aftermarket kits go is a pretty swingin' deal.
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 01 XT225, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50