This is your last chance to get the B-Spec Tune for your E46 M3 for $199! After Cyber Monday on 11/27, we will be increasing the B-Spec Tune price to $279. So act fast and head over to our page to purchase it now. If you’re not ready to flash yet because you’re waiting for your header install or your car is in the shop, we can wait. As long as you make the purchase on or before 11/27 we will wait until you are ready. If you for whatever reason can’t flash it, we will give you a full refund. Request to cancel order must be submitted before we send out your tune for a full refund.

Product Features

  • Up to 15 whp / 10 wtq gains over stock baseline tune
  • Up to 30 whp / 15 wtq gains over stock baseline tune with catless
  • Remove CEL for catless exhaust setups
  • 20+ free add-on features
  • Optimized for US 91 to 93 octane
  • Improved driveability & powerband
  • Tuned VANOS, knock sensors, fuel, ignition and more
  • Software available for both US and European specification cars
  • Occasional flames with Buildjournal Exhaust Backfire Burble Tune add-on
  • Safe and will not overheat the car (ensure proper cooling system)