The Accessport doesnt have as many features as OpenSource tuning with TephraV3, the big one is Flex Fuel
That being said, if a good tuner knows what they are doing, they can absolutely give you a great tune on a Cobb. If you already have it, its not a bad gig.
That being said, if a good tuner knows what they are doing, they can absolutely give you a great tune on a Cobb. If you already have it, its not a bad gig.