I like the one under the seat much better. Looks almost factory.
When I last spoke to Seth they were going to do the RZRs tank first, then the XP 2 seat fuel tank would be designed & built. Then maybe a specialized XP4 tank would be designed. The XP900 was actually the first machine he said he had in his shop. Also since the XP900 and the XP4 use the same stock fuel tank, if they built a XP 2 seat fuel tank it would also fit the XP4. Trail Tanks initial looking & measuring, they felt 2 more gal could also be gained with the XP tank making it about 9.5 gal if not a bit more.not much hope for the 2 seaters lol.
IMS now makes it 3 companies that are in the process of making larger fuel tanks for the RZR. This is great! I will say the first thing I saw with the IMS tank that I dont like, is that you have to remove the seat to fill it. For those whose seats have seat belt slots or have doors, that just adds to the complication of removing the seat in order to fill the tank. Also being that the IMS tank looks to be an auxiliary tank you will need a second fuel pump to pump the fuel to the primary tank or engine, and you will not have a fuel gauge on that tank. One easy fix would be to have a fuel neck made to duplicate the stock neck & cap. Then on the driver side rocker panel you just cut a 3-4 inch access hole to be able to unscrew the cap and fill the tank. If you have doors, the door itself will cover this area and no one would know until you open the door and see the neck & fuel cap.I saw this just yesterday posted to the IMS products facebook page, it seems they also are trying to make a tank for the RZR. Not much info other then a few pics that look like it is an auxiliary tank, not a stock replacement and they claim the total capacity will be in the 12-13 gallon range. They say they are still at least 30 days out so who knows, but it looks interesting.