wanted to change to Diablo tune and was going to put the stock tune back in and it says it is corrupted. If I try to put the Dialbo tune in it says it can not and gives a code 4 what do I need to do? I have a T1000 in a 2006 Chevrolet Corvette with a 6.0 LS2.

T1000 2006 chevrolet corvette 6.0 LS2

Went in to change the tune from 91 oct. to Diablo tune and was going to put the backup in and it is saying that the file is corupt and if I try to put in the Diablo tune it gives me a code 4 how do I change this tune or get my stock tune back if I ever need it. Thanks

when to change to the diablo tune and was going to put the backup tune in first and it says the file is corrupt giving me a code 4 and will not let me change any tune at this time. The 91 octane was the last written file it says. How can I change this tune?

Is the diablo tune or the 91 octane which one gives the best performace