Well, I was thinking about ordering the plenum since I have that 50 dollar store credit, but I was wondering how the gains would be on a pretty much stock 99 GT. I just want to get a decent gain for my money without having to buy the TB right now. Thanks for any opinions.

 

I have done a lot of research on these plenums, on a mostly stock engine, I think you will realistically gain 5-7 hp and 7-10 ftlbs of torque. I havent taken the plunge yet because I am waiting for all these rumored 2v manifolds to come out. HPS and BBK are supposed to have some reasonably priced manifolds, tenativley priced between 500-700 Dollars. I am waiting to see some dyno numbers on these. If I was to go with a plenum, Iwould definetly go for the Accufab. In all tests I have seen the Accufab performed the best in the low to midrange and was equal to all competitors on top end. And it looks awesome too.

 

Yea, im just trying to justify spending the extra dough for shininess and 2 extra hp...I need some near stock dynos...

 

I wouldn't go for an plenum just yet, I would wait, and just build up the suspension and get some sticky tires, I think they would help you better down the track.