Description
These are optional 1.4mm x 8 hole Shock pistons for the Kyosho Inferno MP9 and the big bore shock sets for the MP777 STRR, STR and WC. These have special holes drilled in them to change the action on the piston in the shock trough its stroke. These pistons create more "pack" than the straight cut versions. They will help the shock resist fast movement in the compression stroke of action.
These are now the stock shock pistons in the Inferno MP9 TKI3 shocks for the rear. Many racers will change these out for the straight cut versions.