I feel the need for speed, and am considering a Dinan Stage 1 Performance Engine Software/Boost Upgrade for my 2007 BMW E92 335i (N54). Price is $405 plus whatever the Mobile, AL BMW dealer charges, or ship the DME to them. Power increase is supposed to be 44 HP and 78 FT-Lbs. My car has a stick and 93K miles. Anybody dealt with Dinan's software?

I've had Dinan software on two previous BMW's (N54 & N63), and will have their stuff on my '18 440xi (B58) when it arrives next month.

Their products are expensive, but much, much more refined and developed than JB or other competitors.

I've only used the dealer to program the DME, but will stop by Dinan in the Bay area for the installation when we drive the 440xi vert from the SoCal dealer to Montana.

I think you'll be pleased with the power and drivability.

Steve Dinan is pretty much a magician with BMW's. Get it and go fast.

Bottom line, BMW dealers INSTALL his parts. That's a pretty damn solid endorsement.

RMD

I currently have a Dinan tuned F10 550i that has earned the badge. I would do it all over again without any hesitation.