An update for this thread: I do not recommend PAR!
After ~5,000 miles on my PAR gearset the input shaft broke (this is what I was told by AndrewTech). Very surprising considering I am only a Stage 2.
Before this event, I had a grind from 3rd to 4th gear. I was constantly e-mailing and calling AndrewTech in regards to my grind issue and was not given a resolution. It was recommended that I try 2-3 different gear oils and that was getting expensive. Then, my input shaft broke. PAR did replace it, but it did put me off the road for over a month. I am finally back on the road and still the same issue, the grind from 3rd to 4th.
Considering the money and resources spent for this rebuild I will not be recommending this gearset. The warranty is great and all, but it's very inconvenient being out of commission, then back on the road with the original issue remaining. Not only is it frustrating, but it speaks volumes to me about their level of customer service. If/when this breaks, I am doing a 6-spd swap.
2007 WRX TR | Stage 2 | PAR Gearset (Built by AndrewTech)