Ferrari LaFerrari test mules will be auctioned off.

A very early Ferrari LaFerrari test mule will be auctioned by RM Sotheby's on May 14.

Codenamed M6, the test mule is based on a Ferrari 458 Italia and remains largely stock on the outside. However, it is equipped with an early version of LaFerrari's hybrid powertrain, which includes a V12 engine. However, this engine is the F140FB, not the later F140FE version used in the production LaFerrari.

The removable exterior panels are fitted (and included in the sale) for a specific stage of testing. Also, according to the listing, engineers modified the shock towers as part of a weight distribution study.

The test mule was used primarily for steering, suspension, brake, tire, and stability control testing between May 2011 and December 2012. It was then passed on to the Second Family Murotipo and Third Family Presley prototypes, which debuted in 2013 with bodywork similar to the final production LaFerrari.

With that work completed, the test mule was sold to a private owner in July 2016 and was refreshed and repainted as part of the sale. According to the listing, it is officially recognized by Ferrari and certified by Ferrari's Classique department, but is not roadworthy; RM Sotheby's did not release a pre-auction estimate, but a later LaFerrari prototype that more closely resembles the production model sold in 2017 for It was noted that it sold for $2.2 million.

According to Ferrari, the last production LaFerrari produced 950 hp and the coupe version ran 0-60 mph in less than 3 seconds. Ferrari produced 500 LaFerrari coupes and 210 LaFerrari Aperta convertibles. The last car of each body style was built for a charity auction.