Well.. specs on it look awesome. Slimmer design, 40mm valve with Tial 35/38mm flanges, supposedly a direct replacement.
The cons to it, in my opinion, is the proprietary springs that it takes.
Link can be found:
http://www.jgstools.com/turbo/wgpg.html
A few quotes from the forum I found this on:
We build these wastegate with some very expensive materials, the valve housing cost over a bill in time and material alone... So the price is what it is, if the features don't help your application I suggest you buy a Tial or EVO
Springs- my springs have to be smaller because of the size.
I'm working on including a selection of springs with the wastegate, our smaller diaphragm makes dual springs unneeded.
Also included will be shims for finer pressure adjusting.
I'm working on offering soft copper or SS shim gaskets even though gaskets are a waste if your manifold and downpipe surfaces are flat like they should be. A little ceramic putty works wonders as well.
As for testing, my hardware has survived up to 1 million cycles and repeated high heat tests.
Springs are changed by removing a single snap ring from the top, snap rings save space
I will provide a full selection of internal replacement parts (the beauty of making every part your self) but all the parts have passed the million cycle high pressure test so it'll be very uncommon to need any replacement parts
I just slapped one on a local H23 Prelude, badass! The small valve to actuator ratio made the boost response even sharper and it may have even spooled up a little sooner More investigation is in order
So.. anyone have initial opinions on this? I was looking to buy a Tial 38mm for the impending boost I'll be making (as well as get a 9/11psi spring with it), but with JGS's reputation, I have started to look at this one also.