The 32-year-old British star – who already has her own range of perfumes and equestrian wear – had teamed up with horse firm Equi-Trek to create the vehicles, which are copies of her own bright pink horseboxes.
Posting a picture of them on her twitter page, Katie said: “these are my 2 pink horse boxes and I’ve launched them so you can buy them. (sic)”
The Sonic horseboxes retail at nearly £24,000, while the KP Trail Terka trailer costs £4,650.
Meanwhile, it has been revealed Katie may face two years in jail for dangerous driving after she hit a photographer with her car after a theatre trip in Sussex last month.
The brunette beauty – who is married to cage-fighter Alex Reid – was photographed on her mobile phone at the time of the alleged incident.
It is not the first time Katie has had driving troubles.
Earlier this year, she was found guilty of not being in proper control of her horsebox after she veered into another lane on a busy road and was forced to pay a £1,000 fine.