l had exactly same pipe (ebay link) on my KM T1000 30,5cc. my baja was only 4-5 tanks old and l gave a remote to my mate to have a go. he went WOT and after bad landing on the rear of the truck pipe was slightly bent. l could bent it back, but l decided to buy a new dom clone. IMHO the pipe from ebay link made more power than DOM clone because when it was fitted to my baja it used to do wheelies, only sometimes, but it did. after fitting DOM wheelies are gone. between fitting pipes no changes has been done to carb needles.
EDIT.... l have just looked at the picture from ebay link and l think l was wrong. just found a picture of my baja with pipe fitted and it looks difirent.