After having it on for two tanks of fuel.
here are my results.

.5-.8 fuel mileage increase.
and a little getty up on low end and high end.

was it worth $70 ?

I say yes it was.

now,
I just got my Diablo predator hand held and set it for performance and my boost fooler should be here tomorrow.

I should see some serious gains !!!!!!!!!!!! and hopefully black smoke

 

I think I will get one. Was it as easy as the directions look to install?

 

wicked easy. Took me about 15 minutes with hand tools.

I drove my truck this morning in the blizard in 4 wheel drive with my new Predator set at performance and boy can I leave a trail of black smoke!. I adjusted my passenger side mirror so I could see my pipe. I kept gassing it to see the smoke, Im like a little kid right now.

 

just to mention that I didnt notice any motor noise with the predator in conjunction with the ROKK tech