This is EXO Design Kyosho Optima Series Conversion Kit w/ BBS shocks, CNC Titanium Turnbuckle Set & BBS Spring Set Combo. Designed to shift the battery weight forward for better chassis balance. All carbon parts are made from 100% carbon fiber plates. Reinforced front and rear shock towers (3.5mm thick), compatible with big bore shocks. Additional shock mounting positions allow for fine-tuning. Aluminum battery holder nuts and a carbon battery plate. Two aluminum servo stands. (OPT003) OPTIMA CONVERSION KIT. (OPT004TT) CNC 64 TITANIUM TURNBUCKLES SET. (OPT001) KYOSHO OPTIMA CVA SET (Front). (OPT002) KYOSHO OPTIMA CVA SET (Rear). (EXO-005SGD) UNIVERSAL 12mm BIG BORE SHOCKS SET. (EXO-006SPSET) 12mm BIG BORE SHOCK SPRING SET.