As mentioned every insurer is different. Have a good look around and play insurance companies off with each other to try and get the best deal possible. If you plan on modifying the car i'd consider SKY insurance they've been brilliant with me so far. at 17 insurance is always going to be quite high for you, i wouldnt expect to be paying less than 1k at that age but who knows. I'd never recommend Elephant/Bell or any insurer from the Admiral group, personally i think there a shite company and they have monkeys running it who know NOTHING about the cars they insure, but thats my opinion.