The RC10 Classic comes standard with a fiberglass shock tower, which carries all the original geometry; but lacks the pizzazz, strength, optional holes, and appearance that Carbon Fiber can provide. This shock tower maintains the classic geometry but adds more adjustment, including holes found on the race inspired RC10 Worlds car. The tower includes reinforced areas, adding strength in key areas. This, along with the improvemed materials, creates a more rigid feel, increasing the response in the rear-end. Replace the fiberglass and go with authentic 2.5mm Carbon Fiber by JConcepts. - Reinforcement ribs added for strength - 2.5mm genuine Carbon Fiber material - Improves rigidity over stock components