I decided to give this a try. Mishimoto didn't seem to recommend it for a GT500 because they couldn't claim that it would fit. So, I think I know why. Our radiator fan shroud doesn't allow the tank to sit as low as it would in other S550s. Having said that, I checked the clearance as I slowly closed the hood and saw that it does have a little clearance so it won't damage anything. You can see the spacing where the tank mounting brackets don't touch the shroud, which I was able to sort of measure with the supplied hardware (that you came use because it's too short for us). You have to use the OEM mounting screws that are long enough to account for this space, which wasn't an issue for me. I ended up using black oxide washers to get rid of the gap. I'm not sure how highly I would recommend this tank for that reason, but it was worth it for me to have a new look. I'm keeping an eye on it to see if it shifts around or causes any other issues .