i am looking for new rims for my mazda v6 and i falling in love with TSMotorsport rims secondhand but these rims a 8 inch wide, would they fit on the v6??

They should go on yes, depending on the offsted, but you'll find things VERY tight at the back!

There is about 230-240mm of room between my coilover spring perch and the inside of the wheel arch, and 8" rims should have a 225-235 tyre on so you'll be close! You may have to roll the arches a little bit. I've no idea how much room you get with standard suspension but I think it's a little more than I get with my coilovers