In 2011, LEGO released 9 Racers sets in the subtheme Tiny Turbos, all of these sets have been retired. For that year, the total price of all retail sets cost $76, today those sets are valued around $372, a growth of 390%.
Most valuable 2011 LEGO Racers set
30036 Buggy Racer $234.39
Highest growth 2011 Racers set
8303 Demon Destroyer +205.34%
Largest 2011 LEGO Racers set
8221 Storming Enforcer 97 pieces
Most owned 2011 Racers set
8301 Urban Enforcer
9 sets

8221 Storming Enforcer

Theme Racers
Year 2011
Pieces 97
Availability Retired
8221 LEGO Storming Enforcer
Retail $12.99
Value $15.74
Growth  +21.2%
Annual growth 2.8%

8227 Dragon Dueler

Theme Racers
Year 2011
Pieces 94
Availability Retired
8227 LEGO Dragon Dueler
Retail $12.99
Value $16.62
Growth  +27.9%
Annual growth 3.4%

8228 Sting Striker

Theme Racers
Year 2011
Pieces 82
Availability Retired
8228 LEGO Sting Striker
Retail $12.99
Value $27.80
Growth  +114.0%
Annual growth 12.9%

8231 Vicious Viper

Theme Racers
Year 2011
Pieces 96
Availability Retired
8231 LEGO Vicious Viper
Retail $12.99
Value $19.77
Growth  +52.2%
Annual growth 10.1%

8301 Urban Enforcer

Theme / Subtheme Racers / Tiny Turbos
Year 2011
Pieces 45
Availability Retired
8301 LEGO Tiny Turbos Urban Enforcer
Retail $5.99
Value $11.33
Growth  +89.1%
Annual growth 4.1%

8302 Rod Rider

Theme / Subtheme Racers / Tiny Turbos
Year 2011
Pieces 48
Availability Retired
8302 LEGO Tiny Turbos Rod Rider
Retail $5.99
Value $11.35
Growth  +89.5%
Annual growth 2.8%

8303 Demon Destroyer

Theme / Subtheme Racers / Tiny Turbos
Year 2011
Pieces 51
Availability Retired
8303 LEGO Tiny Turbos Demon Destroyer
Retail $5.99
Value $18.29
Growth  +205.3%
Annual growth 8.2%

8304 Smokin' Slickster

Theme / Subtheme Racers / Tiny Turbos
Year 2011
Pieces 44
Availability Retired
8304 LEGO Tiny Turbos Smokin' Slickster
Retail $5.99
Value $16.54
Growth  +176.1%
Annual growth 7.3%

30036 Buggy Racer

Theme / Subtheme Racers / Tiny Turbos
Year 2011
Pieces 26
Availability Retired
30036 LEGO Tiny Turbos Buggy Racer
promotional
Value $234.39
Annual growth 14.1%