Right now it's a 60/40 toss up between Brenspeed and Steeda respectivly. I too am wondering about the fan speed and figured I would call/email and ask about it. For all I know there is a valid reason for it.
Both companies offer the X4 tuner with CAI as a package. Brenspeed offers the JLT CAI series 3, Steeda offer their own design of CAI.
Here is the catch for me and why I'm split between Brenspeed and Steeda. The inlet design (where the filter attatches) on the Steeda CAI looks better on paper but the JLT seems to be the recommended one to buy when reading forums. Brenspeed offers the JLT, Steeda does not.
Edit: I have no idea why JLT seems to be preferred on the forums.
You can read more about Steeda's CAI here… Why Steeda Cold Air Intakes Blow Away The ?Competition? | Steeda Blog
Regarding having to change who you order from…… I suspect that Brenspeed, or Steeda for that matter, would not have an issue if you purchased a tuner from them and already had other parts that you did not get from them.
Example: You receive a CAI as a gift and need to purchase a tuner before you can install the CAI.
It would be poor customer service to charge extra for the tune if you want to buy the SCT-X4 from them knowing that they could loose the current, and possibily future, sale(s).
Now if you want more than one tune like 87 and 91/93 octane tune then I think only AM (Bama) offers that feature without charging extra.
Speaking of AM/Bama... it may sound silly but it bothers me that AM/Bama rebrands the SCT-X4 with the Bama logo when you buy the SCT w/Bama tunes. It makes me wonder what else, if anything, they may have changed.
Sorry, I have a tendency to ramble….LOL.
I don't think you would go wrong with either Brenspeed or Steeda. And if you are planning on getting a CAI with the tuner, going with what they sell makes sense since they should know how to tune correctly for it.