Lots of threads on it,
but I got a autometer Z model. 2 1/16 size, black. there are many options to install, if your a non turbo guy just drill a hose in the exhuast pipe and clamp it on(all stuff supplied in the kit)
if your a turbo guy, you can do pre or post turbo, again read the threads on it. many opinions, like asses everyone has one eh? but thats why we are on the forums to hear all the opinions and look at some ............cheerleader threads rock!!!
I paid about 200 CAD for my entire kit. I bet they are cheaper in civilization. things are pricey up north. And I'm not that north.
The pyro will let you turn up the fuel a bit, and be safe about it, also crank the boost on your 13b-t and your making some power. safely so to speak.....