Constructed out of Aluminum and baffled etc. I have a very good friend of mine who has been doing this for a while now.Excellent work and perfect welds. I am going to have a 2seater Z tank fabed up with extra ports for fuel pumps filters and split with another tank strictly for race fuel. This would bolt in place of the existing tank so no tank in the hatch area. Check out his work and shoot me an email if anyone would be interested in somthing like this. Trucks cars 240z 300z and 280z etc.. any application. email fst300zx@aol.com thanks Matt