Are you talking about going with Osiris or open source tuning? Ive always wanted to tune my nismo, but am continually confused as to how it works and how much it costs. Its not like Subaru where you plug a COBB into your car and load a program onto it i assume. If i remember the tune ends up costing something crazy like $1,000 after everything so i never did it. I think there are two different types of Osirs tunes, not sure what the difference is, or what you get when you buy, something physical? etc.
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