T5 Double Off Road. I switched mine over in a double cab - a single for a double about 2 years ago, all the bolt holes or studs are there under the rubber matting - if you can stay with V W factory seats it will easier for mod-plate approval or whatever you have in your State, the thing that makes non-genuine hard is VW do-not use centre lap strap belts, they use full 3 point shoulder system with recoil all built into the seat - not cheap but safe, (-) one thing the double seat is not the most comfortable for long trips, (+) under is a large storage space with a base for a second battery.