[BMW in NE]

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P/N SKU: D440-1639-ST2. I originally purchased this as Stage 1, but then upgraded to the stage 2 software and added the intake. You can use the app and choose whichever stage you want to run. This has given me 0 problems in the last 2 years I have been running it. In fact, when I took it off today and took the car for a ride I had forgotten how much extra power it gave the car.
Stage 2 (DINANTRONICS Performance Tuner in conjunction with Dinan Intake and Exhaust) Maximum Power: 384 HP, 417 lb-ft of torque.
I did confirm with Dinan that you can run the factory exhaust with the S2 setup without any detrimental effects. I ran the S2 with the factory exhaust for over a year with no problems.

Here are some pics I snapped today as everything was being uninstalled. If you want any additional pictures just let me know. This will ship in the original box with all original manuals.