Personally, my experience with brennspeed tunes has not been favorable. They are a great group, easy to talk with and willing to help, But the tunes I got from them(87, 89, 92)actually made my car slower compared to the tunes I got from Alternative Auto (87, 89) and the superchips microtuner I had (87 octane) was just as quick as the 92 brennspeed.. My best times are using the alternative auto 89 tune. Or as said, you might just have a freak!

 

Can tunes really be that different? I use an 87 brenspeed tune with C&L CAI and noticed alot more power than stock. Now I haven't been to the track yet nor raced but is it the tune or the CAI you use?