They are still laying in my room so i cant give them a review yet lol. Im buying a boost controller soon then I will get the car tuned along with the gears installed. Ive heard from a few people you can gain from 15-20whp with a good tune.
Heard bad things about the 3 bolts too. I've got the Titan gears I would say I picked up around 20rwhp at least with them. If I remember correctly I was at 402rwhp I ended up putting down 425 after the tuner played with them a bit. I can't remember what the exact number was though. It was under 410rwhp before they were adjusted. Plus I don't think the price was that bad on the titan ones.