I'm leasing my 16 wrx and I just ordered the Cobb AP. Since it's a lease I don't want to do make any major mods so I was thinking of just getting a tune. But I'm getting so much conflicting advice that I don't know what to do. Everyone agrees that the stock tune is horrible but what to do about it is where they all differ.
One shop said that I should do a tune and a solenoid.
Another shop said that I shouldn't do a solenoid and just do an e85 tune. Then use the Cobb maps if I wanted to run 93 octane. But I'm hearing that running e85 can give huge performance increases but also can cause problems with the fuel pump.
What do you guys recommend?