Limited Preorder - MaxxECU RACE ECU, Harness, TuneThe MaxxECU RACE replaces the original BMW ECU and integrates seamlessly with the factory electronics, using BMW CAN protocols for a turnkey solution. This is the fastest, easiest, and most effective way to take full advantage of a standalone ECU. Most importantly, we tune your setup to perfection using our proven methods and proprietary techniques. Tuning can support naturally aspirated, turbocharged, or supercharged engines any setup! Included is