ocorral20

cant wait to get this delivered.. should be here early next week!!!!!! you guys think ill see much diference between the 87 and 91 tune???? we dont have 93 where i live

trek757

I recieved and installed mine Wednesday. Yes you will notice a huge difference from the stock tune to the 91! You'll love it. I installed the 91 and then later found one place in town that sells 93. So I filled up with 93 when I was almost empty and installed the 93 tune for now. I could tell the difference between the 91 and 93 tune also. But if I have to travel at all not knowing if I'll encounter any 93 octane pumps, I can always go back to the 91. Hope you enjoy it as much as I am!!

SuperSonic05

there is a difference between the upper and lower oct tunes, but it mostly in the upper RMP rangs. I use an 87 tune for the winter