We carry both the BMS and aFe products and this is an open forum for discussion. The OP mentioned other tunes such as the Dinan and Cobb and I'd just thought I'd point out at there are other options out there for you N55 535 owners.

The BMS stage 1 tune is the only option that currently works on the N55 535i/xi models. From what I know, the stage 2 is not officially released for the N55 535i/xi models and is currently in testing. I'm sure that it will be officially released soon.

__________________

We Specialize In: BMW Parts | BMW Tuning | VMR Wheels | Cobb AccessPORT N54 | Avant Garde Wheels | BMW Headlights
Alan Wei | Alan@ModBargains.com | (714) 582-3330 ext. 8006
Hours: Monday - Friday 8:00am-7:00pm / Saturday 8:00am - 5:00pm (PST)