Epic Motorsport software increases power and torque output, smooths power delivery, and improves part-throttle drivability. ECU tuning modifies the data in the engine computer (ECU). Ignition timing tables, fuel injection, camshaft timing and VANOS, and other data is changed to make more power reliably and without affecting the durability of the engine. New minimum octane must be 91 because of the advanced ignition timing. This is dyno-developed and race-proven power gains engineered in-house on the Epic and BimmerWorld dynos. In addition to the engine tuning, the rev limit is raised to 7,000 RPM and the top speed limiter is raised/eliminated.
Additional tuning is available for race cars with headers and sport cats/no cats and for higher fuel grades, such as race gas. See Related Items below.
There are two options for installing Epic software:
Bench Flash (no additional charge): send your ECU to Epic for a direct flash. No hardware required but the car will be inoperable for a minimum of 3 business days.
ECI flash cable (+$99): a cable is sent that works with software on a Windows PC laptop. You read your stock file and email it to Epic and a tuned file is returned. You keep the cable for future flashing. It also works as a diagnostic tool through your laptop. There is no downtime while the tuned file is being processed.
Because Epic software is custom and made using only your original file (not a pre-configured file sitting on a shelf) this product applies to all 2001-2006 E46 325i/330i, including both MS43 and MS45 computers. Your tuned file will be correct for either ECU as it's based on your original file.
Epic Updates/Revisions: Epic includes 1 revised flash at no charge with your order. If you decide the file needs a change, such as the throttle is too sensitive or you want a new rev limit, Epic will reflash the ECU with a revised tune at no charge. If the new file has an advertised price higher than your original purchase you will only be responsible for the price difference.Notice of Emissions Non-Compliance.
This software was developed and tuned on vehicles that retained all emissions controls. It is intended for vehicles with stock and fully functional emissions equipment. However, it has not been submitted nor tested for approval in California. Therefore, it is not legal for installation or use in California on any pollution-controlled motor vehicle. Some suppliers will not ship to certain states, requiring extra delivery time. We will advise you of any delays. Not legal for installation or use on any pollution controlled motor vehicle in any state, province, or jurisdiction governed by, or which has adopted, CARB or EPA regulations.
BMW Fitments: 3 Series
E46 (99-05) > 325Ci
E46 (99-05) > 325i
E46 (99-05) > 325xi
E46 (99-05) > 330Ci
E46 (99-05) > 330i
E46 (99-05) > 330xi