I have never heard Superchips would cause emissions failure. Do they disable o2 sensors?

 

I've always just run mine on the 87 tune and have been real happy. I do know however, that there are a few guys that run the tow tune with 87 and say it's great. I will try it soon because with regular gas up here only a few cents shy of $4 there's no way in hell I'm using 91 octane....

 

Haha...same here. with oil rigs blowing up in the middle east, i suspect gas this summer is going to be very high. no way i will run higher than 87 octane.

All i could say is WOW...!!!! Just installed it 30 minutes ago and took it for a test drive. Man, it shifts nice, doesn't rev very high, going freeway speed and gunned it to pass a semi and it goes. not like before where my rpm goes to 5k. stayed around 3k. also the first and second gear goes. not like before where it was sluggish and you have to really step on the gas to go. I love it.

I'm using 87 octane and went for the 87 tune. I can tell the difference. Maybe i'll try the tow tune next.

Thanks all for great responses and advices.