Definitely late to the tuning game with almost every other tuning company now moving to OBD flash but here is a new tune from Weistec Engineering



The F8x M3/M4 vehicles are just too tempting when it comes to upgrades. While they have great performance right off the show room floor, it is just too hard to leave them untouched. That's what happened when a member of the Weistec team picked up an F82 M4. Immediately, the ECU was removed and we set to work on modifying and testing. After months of testing on our own vehicle as well as a few other test vehicles, the Weistec S55 ECU Upgrade was ready


The Weistec S55 tune provides solid gains through out the entire powerband, with peak to peak gains of 40HP* and mid range gains of as much as 120HP* and 160lb-ft of torque! This is on an otherwise 100% stock vehicle, including the air filters!


In addition to the performance gains, there are a couple options available for race vehicles. First is the "Burble". The M4 GTS comes from the factory with this in a mild form. You can choose "Off" "Mild" or "Aggressive" for the "Burble". Many seem to prefer aggressive, but we gladly will let you choose based on your preference.


The other race vehicle option would be Catalyst Heating. On race vehicles, many times the catalysts are removed. In those cases, there is no need for the catalyst heating which would just be making excessive noise on a cold start of the race vehicle. If you have a race vehicle with the catalysts removed, Catalyst Heating can be disabled.
Key Features:
Improved Throttle Response


Optimized Fuel, Spark, and Boost

  • 40 Wheel Horse Power Peak to Peak Gains
  • Up to 120HP gains in the mid range
  • M4 GTS "Burble" Mild and Aggressive Options (for Race Vehicles only)
  • Disabled Cold Start (for Race Vehicles only)
  • Disabled Speed Limiter




NOT LEGAL FOR SALE OR USE ON POLLUTION CONTROLLED MOTOR VEHICLES
Weistec Engineering performance upgrades may be used solely on vehicles used in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions. For state specific details please visit the following website. http://www.semasan.com/emissions
It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.
This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.
All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.