Team announcements • On September 17, 2012, it was announced that the
DeltaWing prototype had been cleared for entry into the ALMS for 2013. • On October 26, 2012,
Porsche announced that it would cease development of the 911 GT3-RSR (Type 997), which had competed in the series since 2005, to focus its efforts on developing its next generation 911 GT3-RSR (Type 991) race car set to debut in 2014. As a result, the development partnership with
Flying Lizard Motorsports was discontinued. Porsche will, however, continue to provide support for customer teams continuing to compete with the 911 GT3-RSR (Type 997). • On November 15, 2012,
Flying Lizard Motorsports announced that they would transition to competing in the GT Challenge category. On that date they confirmed a full-season campaign for their #44
Porsche 911 GT3 Cup entry to be piloted by team principal
Seth Neiman and 2-time
24 Hours of Daytona GT class champion
Spencer Pumpelly. • On December 2, 2012,
BMW announced that they would stop racing with the
M3 GT2 in favour of the
BMW Z4 GTE model. • On December 5, 2012,
Rebellion Racing announced that they would contest the full season with a single
Lola B12/60 Toyota P1 Prototype. The team will also enter a second car for at least the
12 Hours of Sebring. • On December 6, 2012, CORE Autosport confirmed their return to the PC category with drivers
Colin Braun and
Jon Bennett piloting their No. 05 entry. Braun and Bennett will be joined by
Mark Wilkins for the
12 Hours of Sebring and
Petit Le Mans. The driver lineup for the team's second entry (No. 06) is still pending. • On December 19, 2012 Paul Miller Racing announced that
Porsche works driver,
Marco Holzer, would join
Bryce Miller in competing for the GT championship in the team's 911 GT3-RSR (Type 997). The team also announced the switch to
Michelin tires, having previously competed on
Dunlop tires. • On January 18, 2013,
Risi Competizione announced their return to the GT class. They will field one
Ferrari 458 Italia, with drivers yet to be announced. • On January 22, 2013, CORE Autosport announced that it would field a
Porsche 997 GT3-RSR in GT, in addition to their PC effort.
Patrick Long and
Tom Kimber-Smith will drive it. •
Extreme Speed Motorsports will switch to P2 fielding two
HPD ARX-03b prototypes, retaining drivers
Scott Sharp and
Johannes van Overbeek in the No. 01 and Ed Brown and Guy Cosmo in the No. 02. ==Results and standings==