A Stunt Tank: A gas tank with a Lrge dent or several dents and or cosmetic damage. These tanks Do NOT leak or have any type of damage to make it unusable ie: gas cap opens and locks and will mount on as will the fuel pump. These are pefect to beat in for a seat for high chairs and such. A Track Day / Race Bike Tank: These have minor cosmetic damage. Such as small scuffs or dents and paint blemishes. These Tanks Do NOT leak and can be filled to capacity with fuel. Great to have as a take off for race day. ****You can use a Track Tank as a Nice Stunt Tank, But a Stunt Tank will probably NOT Work out at the Track.**** Any Question email motorcycleinfo@ymail