Bride IG-Type seat rails are designed specifically for the BRIDE Full-Bucket Seats and can be adjusted up to -50mm of the normal ride height of the seat for a super low-position (will also fit some other brands of racing seat). Rails are FIA approved. Price is per rail set (per seat) – So you will need 2 sets for 2 seats. Please specify side(s) you want when ordering. These are vehicle specific, and are available for most JDM vehicles. Please email to enquire.