Van's will take returns of unused parts for about 2 years after you purchase them, however, if the parts were part of a kit, then the will only credit you with 75-80% of the cost of the part (at the time you bought it). If it was a non-kit order, I think they credit you 90% of the cost. It is the same if you delete the part when you order the kit, they only credit 75-80% of the individual part cost. If there are a lot of expensive parts in the kit that you are not going to use, then it is better to order the parts you do need seperately, rather than order the kit. I did this on both my finish and firewall forward kits.