Very Good
Want to ride it; buy this. Want to rev it at a traffic light; buy the racing version.I own the race version of this exhaust, plus the optional baffle, and now this "Government Certified" variant. So, I have tried them all on the Z H2. This version is louder and better sounding than the ridiculously heavy and quiet stock exhaust, while not being obnoxiously loud. The black one (my other is titanium) looks much better on the green/black Z H2 (the titanium's blue tip really doesn't work with the green). The silencer itself weighs about 2kg (the race is 1.5kg and 1.7kg with baffle), which is a massive improvement over stock and a negligible difference to the race version. It sounds good most of the time (deeper than stock, with a nice growl on the throttle) with the exception of fast idle when warming up, where it does an unfortunate impersonation of castanets; not really a problem as it goes away after warm-up.As I have both variants, I am using the race's connecting pipe (silencer to stock headers) as it does not have the catalyst that is present in the govt certified version. If you don't want the catalyst there to melt your right foot, you can gouge it out, or ask Trickstar nicely to give you the race connecting pipe (which is otherwise identical) instead. I have never used the cat. connecting pipe, so can't comment on its effect. On that subject, Trickstar is not particularly forthcoming on the details of their products, so after reading this you will know more than you could possibly learn from their website, which, in my view, is not acceptable when they are asking us to part with so much money for these items. Compared to the race version, this is considerably quieter. However, the bike also runs noticeably better with the govt certified exhaust. By "better", I mean the idle is smoother, power delivery is more linear and it seems more torquey (which could be my imagination due to the smoother power delivery). So, clearly, the bike is not fueling as well with the race exhaust. While the exhaust noise is less, I can hear more of the engine and induction noise, which is nice as it's a good-sounding engine. I'm not talking about the supercharger chirp (although that is also more apparent) but the engine's delicious turbine-like howl, which I can't hear with the race exhaust. I put the race exhaust back on my bike this morning, just to remind me why I forked out so much cash to replace it, and within a few kilometers I was looking forward to reinstalling this one, which I did as soon as I got home. I definitely find the bike more enjoyable to ride with this govt certified version. I did a 2200 kilometer ride with this exhaust on last week, and the race version would have been quite annoying over that distance. View Detail