Originally Posted by dominantgazelle
How do I know if a gti'd gt has a GTi valve or a regular valve?
And also is there any way to tell a gti'd gt apart from a GTi? Serial number?
The GTi valve has raised angled edges around the front 2 o-rings on the valve, the GT valve does not. If you go to MD or Aggressive's website you can find a picture of the GTi valve. It's easy to tell if you have one by looking at it. If you have one you're curious about feel free to post a pic and I'll let you know.
As for the S/N question, the GTi's just continued sequentially regarding the #'s. I'm not sure if there was a specific one where they GTi's took over or not. Based on the guns I've seen, I don't believe any GTi's would be below S/N 2000 or so, but I have no evidence to back this up or anything.