These option part springs are available to further upgrade items 54504/54505 Buggy Big Bore Aeration Dampers. 3 varieties of hardness are included to allow racers to tailor their car’s suspension to the unique challenges of each course.

• Hard springs x2 (.61 spring rate)
• Medium springs x2 (.56 spring rate)
• Soft springs x2 (.52 spring rate)
•  
•