Not nearly as big as the Titan tank, all 250cc 's of it! The Titan tank is 3" wide, which is 1/4" too wide for my truck. From those dimensions, it's not much bigger than the MP tank. Even tho, 160cc's is more than 125cc's. My only other alternative is to fabricate one. I am, however, hoping those dimensions are relatively accurate, as I just ordered one.