-- With this high-quality foam earbuds, you are able to protect your ear from noise surroundings and listen to the radios
-- 1/8" Mono audio plug
-- 1.5ft Cord Length

-- Impedance: 22 Ohms.

1) Are the foam tips replaceable?

Of course that please see the 6th photo.

2) Are the racing foam earbuds available as a customisable item?
Of course that customizable item is available in 5th photo