I have a 1999 GMC Ck, 2wd, 5.0 vortec, K&N airfilter, and aftermarket exhaust. I am thinking of trying this Tornado thing I saw at autozone, they claim at least 30 horse, what do you think, anybody try it yet? Also, witht he mods I have, what is my hp, tq? thanks much.

 

It does not work. Its a piece of junk. Don't fall for the vara-ram velocity stack either.

 

save your 30.00 for gas not worth it, also prolly around 290 horse, im guessing somebody else will prolly chime in with a better breakdown of your horses.

 

Ask them if they are willing to put there money were there mouth is.Tell them you will buy it and if it doesnt dyno 30 more HP you want triple you money back plus dyno costs.Also tell them if you pick up 30 More HP from it you will pay them triple the price for it because it would be worth it.You know the lying bastards wont take the pepsi challenge.

 

Isn't 290 a little high, I was thinking, maybe about a 10-15 horse, tq gain, because I could feel the difference in the seat, but I just wasn't sure as to how much. It does sound pretty nice, even though it was just a cheap muffler exchange. This thing has got 3.42's out back, and it loves to hum down the highway at 85 without a sweat, and its a **** to keep at a steady speed, it just wants to keep going faster without trying. I love this thing so much, i had driven a non vortes 5.0, and I almost puked at how gutless it was, so they did dam good. And that tornado thing was about 65 smackers here, so I dont think Ill waste the money.

 

I have tried these things years ago and I could not feel any hp gain but I did get a slight mpg increase in my 94 Jimmy 4.3 liter. I put one in my wife's 01 xl7 SUV and saw no improvements.