Cat delete question

[RonaldoM03]

i want to dona cat delete and E85 tune my question is when i take the cats off can i drive it like that with no tune or would i require a tune for the car to run right?

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[Need4SpeedMotors]

i want to dona cat delete and E85 tune my question is when i take the cats off can i drive it like that with no tune or would i require a tune for the car to run right?

It's best to have a tune, the car will still run without it but fueling is going to be off. The O2 sensors are seeing more airflow.