Hey Jeff I'll answer your question. The 2G radiators are a DIRECT bolt on, you don't have to change anything. I kind of notice it gets a little tight for the overflow bottle, but not enough where you can't fit it in still. The stock radiator hoses can be used with out any problem. The radiator itself is almost twice as thick and can take a lot of extra coolant. It flows 30% more than the stocker. Anyway, I hope that helps to answer your question. Just remember, direct bolt on.