The upgraded turbos feature the factory OEM Garrett housing which is modified with new parts including new compressor wheels. It is also impressive to see Weistec setting records so quickly on the the M157 platform after having essentially mastered the M156. Simply phenomenal progression. Dyno below, on 100 octane, Dynojet, SAE correction:
The previous horsepower record was held by Renntech with a pull of 627 wheel horsepower and was done on the stock turbos. The upgraded turbo era of the M157 is here. Pricing information on the upgrade to come soon. Congratulations again to Weistec Engineering, video below.