personaly, with restraint, I wouldn't dismiss the jwtt as less reliable to be honest, yeah, there are more potential problem areas, but not to the point of being unreliable if installed well.
also, since were on the subject, before thinking about the stillen sc, you really HAVE to hear one, in person, to make sure you can live with what it sounds like.... it is very very loud to say the least, the jwtt is probably worth the extra $$$ just for what it sounds like over the stillen
Try this. The NOISE you here is does not do justice, since it's been taken with a camera phone.
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You guys need to remember something. Our brain has a function that remembers the best of everything and then compares it to the rest. If you remember your childhood, when there were no Answering machines, the phone would ring like 8 times before you'd give up and hang up. Now adays, if the phone rings 3 times and the party does not pickup, we automatically assume that they're not going to pickup. This is the function of that part of our brain.
Anything we do to our cars that makes it a hair faster would be recorded by our brain and oncer there, it's going to be normal again. It's basically good for a few weeks and then you'd want more. So it does not matter if you start with a SC and go to TT. Once you get there you'd want more. So start low, then slowly burn your money.
Take it from someone who just added a SC. IT'S NEVER ENOUGH, until you're broke or you blow the engine.
If you're thinking that you'd spend $12K and you'd be speed racer, it'll never going to happen. There is always faster, better, and cooler out there and until you have it, you're not it.
I'd say, save your money, sell your car, put the $12K and the rest of the money you're going to spend, and buy a WRX STi. Otherwise, just drive the FX for what it is.
Personally, I think $6000K plus that I spent for Less than 100 whp. was wasted. Knowing I can take any stock G/Z, Priceless.
The other day I passed a Brand New Shelby Mustang. The guy was riding my azz for 5 miles trying to get ahead of me. I had enough under the hood to get me by. There was not win or lose, and he would have eaten me alive if there were no other cars around. So unless you live on race track and do 1/4 Miles all day long, the SC is enough for the daily driver.