Hyuara isn't a unicorn but it has a cool design on it =)
There's 17 unicorns... let me find the list:
2002 BMW M3-GTR "Street Version"
1969 Chevy Camaro SS Coupe (if you had this in your FM3 Garage you'll get it in FM4)
2007 Ferrari 430 Scuderia (If you had this in your FM3 garage you'll get it in FM4)
2003 Ferrari Challenge Stradale
2007 Shelby GT500
2004 Mugen Civic Type-R
2002 Mugen Integra Type-R
2005 Honda NSX-R GT
2007 Lamborghini Gallardo Superleggera (if you had this in your FM3 Garage you'll get it in FM4)
2007 Lambo Murcielago LP640
2002 Mazda RX-7 Spirit R Type-A (if you had this in your FM3 Garage you'll get it in FM4)
2006 HKS Time Attack Evolution CT230R
1993 MINE'S R32 Skyline GT-R
2002 MINE'S R34 Skyline GT-R
2004 Top Secret Silvia D1-Spec S15
2006 Subaru Impreza S204 (if you had this in your FM3 Garage you'll get it in FM4)
2002 Top Secret 0-300 Supra